UNIT - Creature Balance + Visual Changes

Machines are a topic that has probably been discussed in every thread on this forum.
In short, the essence (in my opinion):
At the beginning of the game, machines work well as they are, without any changes, but in a prolonged game, they start to fall behind.
If we strengthen the machines, we get more powerful units that are interesting even for a prolonged game, but also a very strong skill for the start (I won't call it overpowered - it all depends on the degree of strengthening).
In general, a pleasant enhancement of the skill that doesn't turn machines into an overpowered unit is to increase the HP of all machines (without going overboard), as well as increase the number of shots of the siege engine.