It took one attack to destroy the physical structure.
This the same amount of physical damage done as the other Dragons.
She also ran out of magic after her fight from Ezel not trying to destroy FACE. She destroyed FACE with just the backend of her attack as the power was diminish by Ezel cutting it up. Actually that is not how much a single FACE power has. It was the self destruct which the Dragons didn't initiate. It's like saying Jellal's self destruct on Nirvana was the scope of his mp when clearly his attack power was not shown to be powerful enough to destroy it. FACE also doesn't have magic power in it otherwise it would be powered down as soon as it used Anti Magic lol.
Wall was stated to be able to destroy Magnolia if he wanted to with that 400km attack. It only was "tanked" by Christina bcs he only wanted to destroy the guild. Christina also tanked Acno attacks as well.

Irene was able to get across the entire country with relative ease. She has teleportation among the capabilities of a dragon. Her deus sema is also far above the Dragon's Continent crossing speed feat and Erza easily outpaced the meteor by twice it's speed. Irene had no trouble reacting to either Erza or the meteorite. Irene summoned a meteor from planetoids away. That gives her multi planetary AoE lol. Jellal has never shown such a feat. His spell isn't even the same as Deus Sema as Deus Sema is as Irene is enchanting a meteorite from space while Jellal creates his. He has never once shown the ability to pull a meteorite from planetoids away. Irene also stated her enchants reaches beyond the planet and then shows it.
So yeah, she can attack from anywhere on the planet with Master Enchant. She can just turn U1 into a bomb lol. Anything she imbues her magic with can be turned into whatever she desires. Why wouldn't she? Literally no one in Team Natsu was frightened by Grandeeney's MP level and none of the Dragon Parents were even regarded by Acno lol. Irene has better statements, actual magic power feats, and reactions than Grandeeney.
Queen of the Dragons is her title not Sage Dragon lol. Sage Dragon was Belserion's title. Master Enchanter > High Enchanter > Basic Enchanter. There is no way Grandeeney is on Irene's level enchant when all she has shown is basic enchants. Irene escaped death by putting herself into Wendy's body and can literally take over a host at anytime she please. She also shown the ability to straight rip souls/magic(inifinite magic)/peope out of people, matter manipulate, reality manipulate, life creation, matter creation, and more with her enchants. Milky Way isn't even an enchantment magic either lol. Irene can amplify magic and stats as shown when she boosted Neinheart and the 1 mil soldiers. Stat boosting is also only a regular enchant level spell. She had trouble with Erza and Wendy bcs of plot. She literally whooped Erza in Wendy's body. Grandeeney hasn't literally done anything to say she is even as good as Erza with just a DS sword lol. Who is talking about Aldoron?
Every single attack from Erza produced enough force to push him down. It wouldn't have mattered if it was thousands swords or not if a single sword didn't have the ability to knock him back. Grandeeney doesn't even have a physical strength feat on the level of Aldo Brandish/Gajeel lol. Irene >>> Brandish by Brandish own words. Yeah, Erza is a human. She is not a dragon who have scales that give them a natural resistance to magic based attacks and humans don't have the same physiology as Dragons that give them natural strong bodies. But we ain't talking about magic-less Erza, we are talking about Erza that destroyed a stronger attack than Aldo sized Gajeel lol. She is by feats above Grandeeney. Also why are we acting like Irene isn't a Dragon as well?
Not a single Dragon bar Igneel have feats on even Brandish's level let alone Irene's. Human Irene >>> Brandish >>> any feat the parents Dragon bar Igneel have.
Never oneshotted by Erza. Got praised by Acno, made him gawk at her power, and sealed him away better than a time paradox. Deus Sema literally created continental shockwave upon reentry and came from planetoids away.
Literally shrunk a continental sized country to 1/20th if its size.
The S12 were never scared of FACE. They were scared of Zeref lmfao.
Zeref, Irene, August, Wall, and Brandish have all shown the means to get passed FACE. Zeref only stated it would caused widespread damage to his army, but nothing of it scaring him. Even goes on to say it was only bcs the time was not right to strike and that they don't stand a chance now. They were also talking about ten years ago which most of the S12 would have been kids lol. Beating his fodder army is not the same as beating his S12s.