High tier armies already can beat larger low tier armies.
Armour is made out of tissue paper, hopefully, will be fixed someday.
And moral basically doesn't exist, it would be nice if they added that.
Also, there is actually lot of units, such as pikeman. The problem is they are actually secret, so not many players know about them. f.e. staying with the pikes, did you know Empire actually has heavy pike infantry? It's called Elite Cataphract. Don't think too hard about why that's the case, just roll with it