Don't take my word for it, take Little Wars TV word for it.
Also, there is a discussion about Men of Bronze and they touch on changes to Wars of the Republic here:
I hope these are useful to you.
However, I will tell you this. If you are coming from the perspective that WRG 7th Edition (and its imitators) and the concept of the end-to-end Battle line with no gaps is the be-all-and-end-all of Ancient wargaming, you will be disappointed.