If you mean the cattle prod, it's indeed cumbersome and will get an upgrade to mitigate that. Still, compared to the basic stun stick, it's much better for avoiding melee reactions (by one-shotting the enemy) and piercing armour (both because of higher damage and armour penetration). It's more of a specialist weapon than the little club you can stuff into everyone's pockets.
Strength is a 'secondary' stat and is increased by doing stuff in combat (hitting enemies, reacting, psi, getting panicked). If you do something, you get a roll to increase strength (and all other 'secondary' stats) at the end of the battle. Unlike 'primary' stats, it doesn't matter how much you do that something, or what exactly, just that you do it.
Strength has a cap, but it can vary between soldier types (basic agents and quite a few others have 50, hybrids have 40, etc), plus armour stat boosts, commendations and transformations can be added to that. Usually, the gym cap is 5 points below the actual cap.
Sadly, no cats in this mod, unlike Piratez. Bats have insane melee dodge and flying/night vision/camo, so can be very useful in some situations. They're kinda hard to acquire and keep alive, though, since they tend to start dying from even the softest touch.