Hey! I've been reading over the witchwarper class in hopes of getting to play one in the near future, and I'm a huge fan! One of my favorite elements is the inclusion of cool ways to "warp" enemies, and the resize creature paradigm shift is totally within this ... paradigm. (See what I did there?) I dig it .... conceptually.
But in practice? What is this paradigm shift even supposed to do? Starfinder worked SO hard to decouple size from stats that it seems like the size shifting aspect of this ability doesn't really matter at all, and this ability is more a way to inflict the shaken condition on an enemy with a flavor component to it. Are there inherent benefits / penalties to having your size changed in Starfinder that I'm not aware of? Also, if you use this ability to shrink an ally, are they shaken too?
I sort of think that this is a paradigm shift that would be better off if it got made into a 1-6 variable level spell so the whole "getting shrunk" was allowed to have some real teeth and/or sense of ramp-up with level. Shrinking someone by one size category isn't really impressive if they're just as strong, just as fast, have an identical AC, and so on. (And if you're immune to fear, being shrunk does NOTHING to you.)
Great class overall; looking forward to getting to play a witchwarper soon!
As far as I can tell there is zero impact for going between small and medium, but medium/large allows you to give/take away reach, and can force or avoid squeezing penalties if you're in a 5' corridor. Otherwise I've got nothing.
In addition to the shaken condition, it impacts space and reach (and by impacting space, impacts what size area you can squeeze through).
If you guys end up keeping it as a paradigm shift (rather than make some awesome new spells), it might be helpful to call that out then. Enlarge Person and Reduce Person make the callout in PF, and its uber helpful.
The ability also feels like an anti-pattern.
It feels bad as an ally buff because they suffer the shaken condition. It also makes it awkward in Society play because you cannot deliberately harm your allies without their permission.
It feels bad as an enemy debuff because you have to touch them, which feels awkward as every other debuffing paradigm has a medium range.