I would say that the Thunderbolt, is another of those designs like the Archer, Something at all ranges, however with a enough heat sinks to fire most weapons.
The problem I generally have when actually playing with mechs like this especially in the 3025 era are that they are ammo bombs. Beyond Laser Boats, like the Ostsol, Downgraded Thug, you are going to have 1 or more types with one or more tons of each type. IS CASE with XL Engines doesn't quite cut it for safety factor, though Clan tech makes the risk more acceptable.
I like the Generalist mechs more for flavor, and some like the Archer and Thunderbolt, have strong variants in all eras. In the IntroTech era, a Lance of Archers and Thuds are neigh unstoppable, Ton for Ton, BV for BV. Even more so if you are playing 2 Lances and can toss a Lance of Phoennix Hawks o Grasshoppers in there for spotting.
Given the choice, like when I play Megamek, I prefer Combined Arms, Hover and VTOL Scouts, Medium, Heavy, and Assault Mechs, with LRM Carriers or Arrow Launchers.
The 55 Ton to 70 Ton Weight Range, are the sweet spot for everything designs. You can still have enough Mobility at the upper weight limit and keep enough throw weight at the low end. To both make a passable Scout, or a Cavalry Mech, or if in mobs a Fire Support team.
The problem with specialist designs is that the game doesn't scale up well at least until Alpha Strike, a Battalion on Battalion TacOps Game can and will take days to play, and that is where specialists designs thrive, when you have a Lance of them. When you have only a Lance, then the Generalist Shine, an Archer, Phoenix Hawk, Thunderbolt and Crusader. They can Play Fire Support, Cavalry, and the Phoenix Hawk and Some Crusaders can even be scouts.