Thanks a lot for this testimony!
T9A was started with the goal to provide WH feeling with streamlined rules and superb balance, both internal and external.
Which rules version did you play? 1.3?
Note that there is 2nd Edition at the corner. We should publish the beta for public testing in a couple of weeks, and the edition will be official in mid spring 2018.
We went a bit further in adjusting rules for a game which is easier to play and makes more sense; in the process of adjusting all AB, they received a few adjustments as well.
After 2nd Ed is out, the rules shall not change anymore for years, in a similar way that GW changed edition every now and then (except that T9A delivers lots of information before the definitive print). The next changes will be the army books themselves, which will be overhauled completely. The 3rd or 4th in line is DE. It will have as usual corsairs and monsters, assassins and cultists, but... 1) all units will be playable and useful, no more sub-par fluffy units, and 2) much greater coherence, with all units having a tactical role and a very coherent fluff (no more unrealistic faction of assassins).