Lua doesn’t have the += and -= operands, Instead of Atk += value you have to “spell it out” : Atk = Atk + value
I think there will always be meta builds, because there will always be people who try to minmax everything possible.
But i hope what will be done is making the difference between meta and non-meta builds less obvious so even non-meta builds are, to put a number on it, at least 80% as effective as meta builds.
Heck, they already made Thaumas buffs quite nice (~1.6k atk/matk and ~600 def with the two swell arm skills) so it’s likely that we’ll see more Thaumas in the future.