What people here often forget is that most of previous Toei efforts, despite not having the best production values, ahve managed to stay relevant even at international level. Yeah kids, Toeiis still a relevant and big studio. At this point, I think is not so much production values wha defines the best anime studio to work with, is how well they manage a product to make it good. Of course, Toei won´t always have successful products(depending of the staff) but they have done something as good as any overrated Bones or Madhouse production. Ufotable is a good studio with the graphics, yet it seems that only their Fate/ adaptations are good in writing terms.
But as always in the internet, "if you hate Toei, you´re my friend. If you love it, you´re not. Hate it please!!!!!!!!!!!!"