Personally I'm having a blast and the game is getting better with every single patch. With a new patch every 1-2 weeks, changing things up and bolstering the agreeably low level of content, it's shaping up nicely.
CryEngine 3.4 and DirectX 11 are supposedly being introduced in the next patch or two. A large swathe of special LosTech will come in in the patch after that. Then they can focus more on optimisations of the engine, the UI and gameplay as well as introducing more maps, game modes and mechs.
I find the whining and whinging on the MWO Beta Forums to be incomprehensible and typically written by troglodytes of a generation which expects a game to be perfection when they get their hands on it, even when they're explicitly told that it is a beta test. It's even so bad that it has certainly affected this thread over the past few weeks.
the only founders i hardly use is the hunchback, but even that i find somewhat useful as a long range sniper with 2 PPCs.
Founder Catapult i use a lot and toss in 2 ERPPCs and a shitload of heatsinks with an XL265
Founders Jenner is decent.
Founders Atlas is just plain fun and can rack up serious damage. .
I use my Founders Hunchback the most. Downgrade the Std engine a tad to 60kph, re-arrange armour a bit, add 1t more ammo for my AC/20, add CASE to protect myself a bit and move the ML's so that if I lose my AC/20 shoulder, I'll still have 2 ML's to fire. Wickedly effective mech, having taken out a few Awesomes at point blank range on River City. It doesn't fare as well on Caustic though and Forest Colony can be tough with the reduced cover in comparison to Frozen City or River City.
Founders Catapult is set up similar to yours. I pick up 2 PPC's, 2 ML's, an XL engine which scoots me along at 75 kph, max torso and head armour and JJ's for the boost in mobility. Nice sniper mech with the mobility to keep people outside of that 90m minimum range for PPC's and 2 ML's for poking holes in people whilst my heat is high and/or I've got issues aiming the PPC's with my 100-160ms ping from the UK.
Founders Atlas... Well, this is just a ton of fun. ML's, AC/20, SRM6's, Std Engine, CASE, loads of HS... bit slow but brutal up close and personal. Certainly a mech with a lot of room for customisation.
Not much of a Jenner fan if I'm honest. I'd much rather rock in my Commando or lately, the Raven with either a Gauss Rifle or AC/20 if I want to be silly and mega evil.
I've got a thing for mixing weaponary types, energy for precision or range, ballistics for big bangs and annoyance and missiles for fire/forget fun. Mixing up a selection of those, configuring up to 4 different weapon groups (all commands are configured on my mouse except WASD), pure simplicity and fun.
My biggest nitpick is the LB-X Autocannon. It is implemented in the laziest and most incorrect way imaginable and is nothing like a Battletech LB-X Autocannon should be like. I still enjoy using it from time to time but until it is implemented as per Battletech lore, it will be disliked and less effective than it should be.