First off: DARN IT!!!!!!!!!!!!!! Can't try to beat my 20 gang record now.
Second: I agree that there will be a big gap between the large gangs and us smaller ones.
Third: I think that defending gangs should get the full points BUT the attacking gangs get less if piggybacking. I.E. Let's say SVs declare on the shadow family because not many are online. They decide to include Vixens, Spawn, and Looney in on the fray. They smack the hornets nest and now the buzzing starts. All of a sudden 75% to 80% of the shadow family gangs are online.
Now, since SVs are piggybacking with Vixens, Spawn, and Looney now they will have to share the points from winning from these gang. BUT, instead, the shadow gangs get the wins instead. Since there were 4 villians gangs declaring on each of the shadow gangs each of the winning shadow gangs should get 4 times what they normally would get. I.E. They would have normally received say 22 points from Vixens. HMMMM, Shadow IV beat the Vixens. 4 gangs from villians (nobody else) declared on shadow IV. Of course, more gangs that jump in just multiplies the points even higher. Multiply the points by 4 and now they receive 88 from beating Vixens. Shadow IV would have received 75 from SVs (since they are a large gang). 75 * 4 = 300 now. I think it would be a deterrent for other gangs to try to jump in and piggyback since they of course would only receive the % of the points as how much they damaged the other gang plus they would actually be contributing to the other gang getting far more points then.
I of course could go on and on but I know everyone or at least most have thought of most if not all these aspects.