You're simply comparing them to the wrong ones. Flax, Necr, Ramp... it's still unclear with them; there are chances for cuts (especially the first two). The same goes for Inferno — it's hard to understand its strength without tests.
You need to compare them with the rest, where the gameplay either hasn't changed much or has changed predictably. I didn't ask for nothing — did Dungeon become weaker than Castle-Swamp(-Strong-Tower)? IMHO it didn't; Cherke still stands above, and that is quite enough.
I consider the Dungeon-Castle pair, taking into account all changes, to be as close as possible to the understanding of "balance." Tower — I never liked this castle in many aspects, just not for me — I won't judge. If Bishop ever feels like playing HotA, you can ask him about it. Strong — a very specific castle — probably one of the most. Especially so in HotA, with many starters (Crag, Dessa, Gunni, Tirax, Grecha) — a lot depends on the map template, color, and specifics of objects, guards, and free gold — therefore there is no single answer; at least not weaker than HotA's Dungeon — that's my IMHO. Swamp — stronger than HotA's Dungeon, except for small templates, but considering HotA's orientation toward super-large templates, it often turns out stronger due to one of the strongest starters in the game.
besides, they are also beautiful (unlike 23-33).
In my opinion, if Dungeon's starting army is to be strengthened, it should be by adding Eye-Harpies to lift the other starters (Lora, Gunnar).