PoE 2 new gem system concerns and thoughts

I am curious how they will keep certain builds in check.
Like those builds where you attack with multiple damage sources like Cold DoT.

for attack it s cool at least now yu can have one aoe and one sinlge target as it was probably intended looking at heavy strike and the like in the past.
for dots, yep, dunnno how they will deal with stavking besides them doing half damage or less depending how many can stack with similar tags.