Here's a list of reasons of why nomad tech is not overpowered:
-The LF cruises at 350. Cruising at 400 is the special thing about LFs. Also, it has 3 guns, and while they are class 10, class means nothing, class 9 are as good as class 10, and nomads can't use codenames.
-The VHF is a flying brick. As agile as a small gunboat, and with the hitbox of one, it's bunch of guns serves as nothing if you can't hit with them.
-There are no Anti-shield Nomad Guns, neither for fighters nor for bombers.
-I personally like both the GB and Cruiser, but they are indeed huge.
-The Marduk has no anti-shield guns either, and has no kind of missile. However, if you are able to keep yourself close from the enemy, it's a beast.