I'm sure you did great against fully tricked-out armies when you had a level one general, no ancillaries and access to no units but ashigaru, and had loads of fun to boot.
Point being, it's retarded that you have to start from nothing. The army customization options are great, but I'd much prefer if everyone had access to them from the get-go instead of having to grind a shitload of lame battles with severely restricted unit rosters.
Most good players use a majority of non-vetted units, because of the raising cost. Its almost always better to have more units then fewer, more expensive ones, as long as you know how to use morale shocks.
Regardless, Vet 4 was usually the highest people got to find a nice balance between cost and power. That takes a couple hours at most to get on most units as long as you use them effectively.
I think the vet and general system added lots to the game and actually made it better and deeper. Sure some things were imbalanced but I'm hoping Rome 2 is better and more interesting all around.
I played with "rush armies" which hardly required a ton of units anyways. Katanas, naginatas, and some yari and heavy cav. With some shit peasants in loose formation to be a meatshield for arrows that noobs would auto-fire on when I approached their lines. I had all the units I needed for this playstyle within 5 wins. Within a few days of figuring out my playstyle I had the entire map unlocked anyways