Towards the beginning there were a few filler Zs that just existed to pollute the drop pool. Some were situationally useful but more often than not were glanced over like Invincible, 54B2, Puprope, Nakupi, Amazora. Some were straight up useless like Zavison. Some from that list are recodes of B or A class units so them being outclassed makes sense. The others within the Z pool had a very clear role. Some used the new elements: photon and gravity, others had all augments, others still had all impairs. That was mostly the starting Z pool or very early iterations of new ideas (in the case of augment, impair and new elements) so it was understandable that they made a few mistakes while testing the waters. Many of them, while not top tier picks, still had some applicable content where their design makes sense. Damage at that time was not overly restrictive and bringing in a non-absorbed element or weapon type didn't punish you outside of not dealing double damage. Fast forward to today and we have a few new Zs to the lineup. Senala, Lacuma, Mizell, Clara, Invincible and Shaplar. Invincible is actually a very solid unit considering it's basically free if you completed the PoF and PoFoF so it will be excluded. Senala: A lot of her skills are dedicated to fire damage, something that Lewto ^, Lewto, Bahamut and Koko already do a very good or better job at. She has no capsules either which is a huge downside for ice content. There also isn't exactly much, if any, new content that needs fire damage either. Her photon damage is average at best and she has an impair skill that doesn't make much sense given the current state of TB. If bosses can 1 shot you and must be impaired to survive it then the content becomes effectively impossible unless you have one of three units who can impair matk. You only get 1 extra turn per impair character assuming 3 impair casts are needed to survive said attack. If you don't need it to survive then any healer in the game will top you off easily. Given the recent trend of use the right weapon or element or do like 10% damage, having hybrid characters is a very odd/poor design choice. For a damage dealing unit she doesn't particularly excel at it and has next to 0 utility on top of it. Lacuma: Does decent gravity damage while in pincer and basically none in chain. No capsules , basically meaningless bow damage, and no unique skills, for the same reasons as above, make him a very uninteresting character. Since we don't have 6 better gravity units yet he'll get a space in your party if you're facing photon/lightning enemies but that's probably it. Mizell: A good unit imo only because of her equip version of disarm kinetic trap. While she has a very high damage multiplier there isn't really any content where non-elemental magic shines. You'd think the one time non-elemental magic should function is in content where non-COC weapon/element gets greatly penalized and yet it does like 20% damage instead of 10%. Clara: Another physical unit that doesn't have either insanely high base attack or atk + 10% self. In TB doing a single pincer on non-boss units will almost always kill it regardless of how weak or strong your units in the chain are. Unbuffed trinity characters and even average physical units can get the job done in single pincers. The second you move to double pincers those Z characters that don't have atk +10% self or phys atk x1.5 fall behind very, very fast. If it's anything like before her one utility skill, the dragon def debuff skill, will be useless since most new content enemies are immune to non-impair debuffs. Shaplar: Has very low dark damage and his recode adds in some sword damage that is more or less worthless. His attack stat isn't particularly high and he has no way of buffing it either. Recently dark damage has been less and less effective as gravity damage is much more prominent though it isn't as bad as photon basically deprecating lightning damage. Some of the recent S and SS recodes have been kind of bland too but those are much more understandable. They're stepping stones to the end game content and the fact that some of them are end game viable is very promising and nice of MW. I don't want Zs to be blatantly overpowered and make all other units irrelevant but I'd like it a lot if their designs actually made sense. Their artwork is very nice so great job on that for sure.