An event/decision heavy small focused mod could result in a compact but quite deep and interesting little game. I'm looking forward to this!
In particular the rising tensions event looks good. Some generic (or just write in about 10 situations where it might happen) events like this in vanilla would be good. It seems as much as EU:Rome continues on from eu3... eu3 has a lot more of a tendency to have generic things, wheras EU:Rome tends to go along the same lines with the same nations fighting each other, just a matter of who wins in Asia Minor, does Armenia survive/become large? Who wins out of Seleucids/Egypt and who gobbles up Asia minor (therefore situations are fairly predictable and you can write events for such).