I do have to agree with some of this -- the Marauder has always failed to perform for me... not only because of it's weaknesses, but because the fluff causes everyone to target it, which enhances it's weakness. Warhammers are a mixed bag... they can do well for me, if I get my normal 2 to 3 turns to set and join the pace of the battle.... but then again, per the people I have played with.... I use very unorthodox tactics.
As for the Timberwolf Prime, it suffers from attempting to be a front line brawler, and, at the same time, a fire support design. A good front line fighter should have one or two hard hitters... PPC's, Gauss, ect. Plus support, whereas the Timby has those LRM's and ER Larges... both better in a support or sniping role. I know that the Clan ER Larges do 10 damage... but the Clan heavy hits are 15 pointers, which makes their Large Lasers the equivelent of the IS Large Lasers, as compared to the Heavy Hits of their time --- the PPC, and the AC/10 ---- They have good range, and decent power, but rely on wear down rather than hard punches. That it sits at the max weight for a heavy just emphasizes it -- which is why I rarely field any other variant than the D with it's twin ERPPC's, although I would prefer to have all 4 SRM6 racks aimed forward.
The Urbie is the unofficial mascot of Battletech... it's the little underdog that could.....
As for another over-rated mech, I have to pretty much state, the Shadowhawk.
Nahuris