Cyber gen is speed based. the mech will have to have speed. unlike other super unit which are slow, the mech will be fast but not as powerful as the destroyer or the shaitan. Plus i think a mech should come in at level 3 but its cool upgrade like a better cannon or missiles should only be available at level 5. the reason for this is because the cuber gen in most cases doesn't last till lvl 3. with these suggestion the Cyber gen can be kick ass. also the mech should detect stealth. the underpowerment can be made up with versatility.
I agree on Versatility over power... thats a cool balance idea, but it has to be able to hold its own in a fight with other units of the same cost. that can be tough to do without making it a power house. it really comes down to alot of factors, how fast a gun fires can make any unit a super unit, or the range of a cannon... very touchy stuff.