Someone With Mass wrote...
Adragalus wrote...
Honestly, it might be more effective, depending on the situation.
From what I understand about the Thanix cannon and the combat tactics of frigates vs. the combat tactics of cruisers, the Normandy's small size and heavily upgraded firepower might be a huge benefit. It can get in to knife-fight range, outmaneuvering the Reaper, and bring a cruiser's firepower to bear. This would allow it to overcome the main weakness of heavy-capships: issues at close range.
I suppose it also depends on how much armor factors into the equation. If the Reapers are only using their version of the Thanix, as seen at the end of ME1, then armor seems to be pretty much irrelevant (completely destroying at least a cruiser in one shot) and the Normandy's agility would make it far superior.
The Reapers have their swarms of Oculi and Reaper destroyers, though.
I would imagine that's where Citadel fighters/wolfpack frigates/etc. come in. I fully admit that's an issue, but it doesn't utterly invalidate my points. Not saying that's what you meant either.

To point, if Oculi and Reaper destroyers made Thanix frigates pointless, then fighters would make anything heavier than a cruiser pointless, dreadnoughts would make everything at long range pointless, and disruptor torpedoes would make anything pointless. Basically, things have their weaknesses, their strengths, and their trump cards. It depends on the situation, and I see real merit in Thanix frigates.
Also, I suppose my viewpoint was more of "heavier classes could be somewhat supplanted by a new series of Thanix frigates," and not the original "are dreadnoughts and cruisers replacable by the new Normandy?"