I was excited to test your shapefix module but... I was disapointed !
First, I have tested the ease-to-use shapefix version, greatly overpowered. But the werewolf and greater werewolf were quite good.
Werewolf in game:
Monster lvl 7, thac0 10, AC 1, 2 atk/round, 20% magic resistance, immunity to normal weapons. 1D12 (act as +2) slash paws
Greater werevolf:
Monster lvl 8, thac0 6, AC -6, 3 atk/round, immunity to normal weapons, regen 3hp/rnd, and many resistances. 2D8 (act as +3) slash paws
From memory, you gave:
- AC of 3 and -3
- immunity to sleep (maybe from bestiary book ?)
- 4D10 heal when recovering human form
- regeneration 2hp/sec for wolfwere
- 1D6 thrust paws (act as +2) : the one we were given by bioware
- others corrects stat
My point of view:
Static thac0 is a problem, it doesn't scale with druid level. with 6 at end of game/TOB, you won't hit many things.
So, I gave a thac0 bonus of 6 and 10 (wolwere/greater w.)
A wolwere lvl 7 will have a base of thac0 of 10, while a greater w. lvl 20 will have a base thac0 of 0
Immunity to normal weapons & Regen. for wolfwere are too powerful.
I have tried it in BG1(tutu) and there is no more fun with that. I removed them. (15 con is not supposed to have regen?)
I gaved AC of 1 and -6, like other wolfwere.
8D6 heal : according to druid book, he gains 10-60% health (1D6 x 10%).
It was impossible to program that so I have based that on a full HP dice lvl 9 druid (72-90 hp). 8-48hp was the best on my opinion
paws : I use the same as werewolf monsters (1D12 (2) and 2D8 (3))
45hp bonus for having 25 con. (5*9, using fighter bonus table). This seems logical to me.
resistances : I have set them to "inc/dec" instead of "set". Because I think that natural resist. and/or items/spells should stack
saving throws : 1/1/1/2/1 as ingame g. werewolf
stun of 6s instead of 3 while morphing to natural form : seems better, but sometimes it doesn't working at all. what about a stun while morph. to werewolf as well ?
another thing : I think this kit was not supposed to wear helms, because it is a piece of armor. I don't wear one with my druid and critical hit are lethal

It took me about 20hrs to modify all that (first attempt to modify IE engine) but the result is fine.
I have also tested the HLA feral rage and there is a huge bug:
After taking the HLA, I have 1/1 were/gwere form.
I would see many HLA for this kit, each one improving a bit one aspect.
- improve paws to +4
- improve atk/rnd to 4
- immunity to fear : how a greater wolfwere can be scared?
...
But it could be unbalanced, I don't know yet
About game balance:
I have actually solo BG1 to chap.5 and the werewolf is fine : die easily to horrors, black guard, archers, but is a quite good fighter overall.
Fire elemental is unbalanced in BG1 (due to immunity to normal weapons), have to use mountain bears instead (which are very good, but can be killed)
I will be lvl 13 soon in chap 6 or 7. Will be fine to test G. were in durlag tower and isles. And then... BG2/ToB