Harmony - Troop Symmetry

The Phoenix at level 5 looks just as absurd as the Hydra. In previous installments of the series, the Phoenix was a top-tier unit. In the original Heroes 5, it was even an 8th-tier unit (the strongest in the game), considering its cost and power. And if we also remember the summoned Phoenix, which is even stronger (9+ tier)... One can understand downgrading the Phoenix by just one tier (to 7), but downgrading it by three tiers (weakening it 8-10 times) is clearly an overcorrection. In my mod, there were also changes in the levels and strength of units, but as a rule, everything was limited to +/- 1 tier (within reasonable limits). The only exception was the Hydra (formally increased from 5 to 6 tiers, but in terms of actual strength, it reached 7), but there were good reasons for this, based on the classic lore and even its external size. Why isn't the option of replacing Unicorns with their flying counterpart, Pegasi, being considered? If Unicorns are not in the game, Pegasi made from their models would not raise any questions.

besides all this, the unit will have regeneration and will be very strong in itself

purely an attacking unit

How will this dragon differ from the Dwarves then? It will be a one-to-one match. And by the way, there are also Cyclops, which perform a similar tank role. Won't the emphasis on the tanking ability of top-tier units become the approach that I personally never liked in parts 6 and 7, due to its one-sidedness?