Well this chapter totally debunked the myth created that graces were SD's power cause if it would have been the case Escanor would have been destroyed just coming near to prime DK, also this chapter proves that Mael just had no courage when he said he stands no chance against the DK cause here a far weaker version of himself easily blocked the DK's attack and would definitely be fighting with him along with king and ban, the time when Mael was against DK mel was when his powers were exponentially decreasing.
Not really. It just proved (again) that Nakaba is an inconsistent writer who is incapable of writing without contradicting himself at every turn. The Graces being fragments of the SD's power is not a myth, it's a fact from the manga. Ludoshel already stated at around chapter 250 or so that the Graces are similar to the Commandments. If you connect the dots you will come to the conclusion that since Commandments are fragments of the DK's power and the Graces are essentialy the same as the Commandments, the Graces are also fragments of the SD's power.
Let's say though that you're right and the Graces aren't fragments of the SD's power, that would mean two things:
1. The SD was at full power during the entirely of the war and the DK equalled her with only half of his true power, which is the same as saying DK (100%) > SD. The DK is a moron for not crushing her.
2. The SD doesn't lose any power for creating blessings like the Sun Grace, which makes the user at noon potentially stronger than herself at full power (as you can see, this doesn't make any sense at all). If that's the case then why the SD wasn't able to just create an army of Goddesses who had the Sun Grace, come to the Demon Realm and fodderize the DC? I mean, if she doesn't lose any power at all from creating the Grace as you're trying to imply, the SD is just an even greater moron than the DK.
As you can see, none of the two options make the slightest bit of sense. The only way this makes sense is if the Graces are fragments of the SD's power (it has been stated by Ludo already too).
Also Sunshine grace's power comes from Sun which is a far far far stronger source than the SD and DK so it's no surprise for me if the sun user becomes stronger than the gods at peak. Also DK's ruler was the only saving grace that protected him against the Mael at high noon or else he never stands a chance
This is bullshit and you know it. The power that set the rules for the user of the Sun Grace to increase his/her power during the day, peaking at noon, is the SD's power and it makes no sense that a Sun user at noon makes the God who set these rules in the first place hopeless.
Besides, how was there any balance in the first place if what you're saying is true? If Noon Mael makes Prime DK (the strongest demon at that time by far) hopeless then why was Mael considered Prime Mel's equal without the OG Magic? See how you're not making any sense? Why would Mael be that afraid of fighting the DK if he makes him hopeless?