The key config files might be a little confusing, but installing ACE and ACRE through SixUpdater is easier than installing DayZ in my opinion. Regardless of the possible difficulties, I think radios would add a lot of depth and emphasize the sense that you are alone and need to reach out for the help of others. Regarding needing Teamspeak, I'm sure some of the groups hosting servers would be able to use their own TS3 servers. UO, for example (which is hosting US 3 and 4) has Dayz specific channels full of people who are very used to playing with ACE and ACRE.