Indeed they are many ideas, but i greatly appreciate the feedback and extra resources!
Some things i can say for certain. For the last update, the wyvern type with wings resting on the ground was intended to be added, but got delayed cause they first needed to be fixed, so that changing wing size wouldn't make them clip through the floor. Which at least means they should be doable for this next update!
However sadly, for the time being, the hydra heads and eye amounts are the least possible to be added, as all dragon aspects would need to be heavily changed to accommodate for the extra parts associated with them too.
Otherwise, the rest of suggestions are very feasible! And since wyverns and drakes are now in the game, the other body types shouldn't be long to be added too (keep an eye out for the fire too =])
All in all, thank you for the feedback!