How the secondary stats work is fine.

What is not fine, imho, is how easy is to get a ton of all the 5 of them with 1 single feature that, honestly speaking, from a whale point of view, do not even cost that much.

I'm of the idea the stats granted by refinements should be cut by 2 at least (so a level 10 should grant +332 at most) and that purifications should grant a positive effect without side effects only up to +50% and that to get something higher than 50% you should get some serious side effects.

Lets say you want a +90% purification to critical rate? With it should come together a -40% to one of the other 3 effective secondary stats (combo, control, injury) and at least another -20% to one of the other 2, so that, for example, your level 10 refined piece of gear should be something like +631 critical, +332 injury, +266 control, + 199 combo.

Lets say you want a +90% purification to critical rate and also a +90% to injury? In that case you should get or two -60% or one -80% and one -40% on the other two stats.

honestly speaking your assumption is not much far from the truth.

they hear about our opinion only if the opinion doesn't impact much on the game.

they can let you have one event instead of another among the currently available ones in the rotation or one ninja in an event instead of another ninja among the currently available ones because on the global scheme doesn't change much, but if you ask for some features or modification that are currently implemented in other versions of the game and that mostly help f2p and that could rebalance a bit the things they behave like if you said nothing.

I understand your frustration and mine is similar to yours in that way. It's just that indeed some mechanics should be modified.