Please don't be discouraged ywing. People only want to see the best for EB-- and the best never happens on the first take (and remember-- even with the best it is impossible to please everyone). As long as you are enjoying the creative process (which is the most important thing) it will show through in your work. If you stop enjoying it give us the big finger and say "do it yourself then!"

One thing that came to me after reading what Imperator just said about the "barbarians". You should definitely mention the Averni/Aedui civil war (power-struggle for gaul). Perhaps pose the question whether or not there will be a strong enogh warlord to become high-king/overlord of the german tribes. Similarly whether or not the warriors of the casse will grow powerful enough to demand tribute from all the tribes across the whole island of britain (or avalon or alba or whatever it was originally called) and perhaps even Eire. Talk about the possiblity of uniting the getic tribes to show those darn greeks who is boss. As for the Lusatanians (whatever) i'm not so sure (sorry Sarcasm-- i'm pretty ignorant of them ).

Just some ideas.