Something about the large druids doesn't quite sit right with me, even though I don't play as the Elves very often.
They still look like ordinary elves, not very large. If you need to, you can reduce their stats.

For now, there's no need to play as the Elves, as they are not yet ready. Priests, Cerberuses, and Executioners are also planned to be large. Druids are large for the same reasons as liches: they require a lot of space for spellcasting (this is a justification from a realism perspective). In the original game, there were too many small ranged spellcasters: monks, mages, druids, priests, witches, and only one large one - the lich. The picture will be more diverse if the spellcasters are distributed evenly by size: 3 large (liches, druids, priests) and 3 small (monks, mages, witches). (This is a justification from a diversity perspective) The third justification is balance. Senior druids have a very powerful ability called "energy channel," which cannot be edited. No matter how much you weaken the parameters (within reasonable limits), the druids will still be too powerful for their small size (unless their initiative is reduced to extremely low values of 5-6), because their main role (supporting the hero) consists of this very channel, and not their parameters. Finally, the fourth justification: in Heroes of Might and Magic, absolutely every unit is unique and occupies its own unique typical niche, in terms of aggressiveness, survivability, speed, activity (initiative), as well as class (large or small, ranged or melee, protected or unprotected). According to these requirements, there should be exactly as many large units as there are small ones. There are two counterarguments. First, druids and priests don't look large. But liches don't look large either - an exception was made for them because they are spellcasters. The same "exception" could easily be made for the former. Second, the Elves, Dwarves, Demons, and Orcs factions may end up with too massive armies, which may feel too cramped due to the extra four squares, especially given the reduced speeds. Whether this is too much or not will be shown in test battles; it is too early to argue about this issue in advance.