The logic was this - in SoD, Fortress has a situation where the starting army is weak, fights are carried by Waspworts, which can be built on day 1, and thanks to this, the breakthrough power evens out with other towns.

With 3 stacks at the start, most towns jump up, while Fortress only gets Flies for a head start. Not much. By the way, Tower has the same situation - it benefits little from 3 stacks, all the power is concentrated in the 1st stack. And Necropolis too.

Hence the logical desire to somehow boost the starting army. An HT version of the army came up for this - +5 Gnolls in the stack and 3-4 Flies instead of 2-4. Not much, of course, but it doesn't need much, and this version at least has been tested.

Okay, the logic is clear, other towns were boosted, let's boost Fortress too so it's fair - no questions there. Although I think the wording "only gets Flies" doesn't reflect reality; it would be more accurate to say guaranteed Flies appear! Need it be said that absolutely all neutrals have an incredible attraction to Flies, and with a certain amount of practice with the Fortress army, Flies pull off fights that are hard to imagine for any other tier 1 units. Well, as for the upgrade at 113-114 and the painless distribution to scout heroes (thanks to those guaranteed 6-8 Flies from the start), that goes without saying.
But again, let's say we chalk up this obvious buff to "other towns were boosted, it was like that in HT, well, carrying meat through the swamp is inconvenient, etc."

Kindergarten logic, excuse me ... the pies differ in weight, and by how much is unclear. I at least rely on HT experience, where Conflux has similar gameplay, while you're counting pluses and minuses in a column. Not serious.

I rely on my own experience; I see no point in comparing it with yours, and that's not the point. In SoD, 8 air elementals from two heroes is a good, above average start. In HotA, 12 air elementals, well, it's okay, could have been more, oh yes, you can also buy them, oh yes, there's always a guaranteed ideal main with a really cool specialty. I'll keep quiet about Sprites, because it's unclear how interesting that upgrade is (I have almost no experience here), but something tells me this is clearly not a difference in weight to the lesser side.

And now I'll repeat a couple of questions:
following your statements, Dungeon wasn't nerfed, it's being held in place. The question is - were Rampart and Conflux, with guaranteed three stacks and 2 levels (especially critical for Conflux, more than for anyone else), really that much weaker than Dungeon in SoD that such a fix to Dungeon was needed? That is, they don't need to be held in place, they have a five-year plan in 3 years? As for Necropolis, Fortress, forget them.
Question - you wrote +20 is too much, can I ask what the criterion for evaluating too much or too little is based on? Oh yes... in HT it was 20-25, nobody complained, they complained when it was 15-25. I proposed another option, agreed +20 Troglodytes is a lot, +12 from the start is too much? Why not at least try this option, when it's obvious that other towns are moving forward, while Dungeon is "being held in place".

No, seriously, you're claiming that Dungeon has now become weaker than, for example, Castle or Fortress (on 8mm6a)? IMO you're caught up in emotions

I seriously claim that Dungeon has become weaker relative to the SoD version. Any dialogue involves emotions, I'm not a robot. But I haven't gotten carried away and don't plan to in the future.

P.S. do you really think my opinion is caused by some inner fire? Or do you think that all opponents give me Dungeon and I only have the option to play this town and no other? No, it's just that it so happens that I have personal preferences and thanks to them, I have a really large amount of experience with this town in SoD. In HotA it's small, but those 50+/- plays on 111 were enough for me to understand that Dungeon was cut. I repeat, if this is party policy, I can only throw up my hands - but the hope for a constructive dialogue between the developers and the community remains.