I don't think progression is slow - its just not strategic with choice. Meaning, there is no possibility to quickly choose a playstyle, let's say quick aggressive attack scouts with daggers with a soveriegn learning fast attack speed spell. By doing said example all other options had to be either eliminated or postponed such as civilization techs, or heavy armor warriors.
And by making this decision you are either in a good or bad predicament. This is choice, this is strategy from the very beginning. Instead every game will begin exactly the same even if you concentrate in different tech trees. Because the tech trees don't really make me feel like I am choosing a particular path.
So I don't think the game has to be sped up but focused in regard to techs, and unit customization. I see my opponent is going for early heavy warrior armies. Perhaps I build a counter to them? Strategy and choice.