I toyed aroudn with the concept of mode swithcing, but this mod did it right. It is far from polished, but the backbone to be great is deffintly there. This is how he did it correctly:

Cat mode/Human mode (effectivly offensive/defensive):
It is effectivly +1 strenght, -1 dex on the basic cards. Just as aspected (I should really make it actualy +1 strenght, -1 dex and +1 dex, -1 strenght, instead of switch on the basic cards. It feels wrong to change te basic cards)

Switch cards:
Switch cards change in utility whenever you switch mode. Different enemies need different solutions, and you can make tactical dicisions on these differences.

superswitching:
A few cards gain bonusses if you switch this turn. Making you want to switch as often as possible

The special keywords:
The special keywords for each mode makes you want to switch.
Human: Confusion does decrease strengh by the next attack damage you do. Cat mode does more damage, so you want to switch.
Cat: Hameroids does damage equal to the stack whenever the enemy attacks. That makes you want to block afterwards.

Now the card pool is a littile low, and some card themes still needs to be polished. I should look the the gardian mod for example of powers that only work when you are in that mode. I should also check if you really need the focus theme, and focus more on ways to gain dex/streght in the correspending modes.