I suggest a little extra, which can help a lot and greatly influence the game. The"fusion". this is a small "skill" that all the game characters have except the commanders, their function is that if a character has 1 life. and another 9. the units can join forming one with 10 of life, as in advanced wars. basically they join the ranks of the unit with more life, leaving only 1 unit with more life. i create a gif to explain. https://es.bloggif.com/output/c/4/c4963847f2e7ef48211a3b80383eee83.gif?1549194974 Pd : srry for my bad english.
I think it's designed to work differently. In Advanced Wars you park a unit on a structure to heal it by 2 hp a turn. Here you absorb your building's health to heal your units by up to 9 hp.
well. what the different is the healing of units by buildings, but why can not units be mixed / joined? that two weakened units join in one with more life? Example: unit 1: 3hp - unit 2:4 hp. mix both units and 1 is left with 7 hp.