THAT is a good point. If forts had different loots that would def make it worth taking some and leaving others. Smaller, newer guilds would probably be happy just to get a fort no matter what the drops are. Larger guilds that already have god item components would have to actually fight to finish a certain item.
TBH at this point fort loots really aren't worth a damn to us. We can get better stuff outside of WoE. A good majority is just "junk loots" not really worth fighting over. Only nice thing about having a fort is it makes GD access a lot easier. Some people actually like to level pre-trans toons in GDs. I've seen leveling parties down there before. It really isn't bad exps for pre-trans.
More forts may cause some guilds to go for secondaries. At the same time having more forts with different drops WOULD provide smaller guilds with an opportunity to take one or more. Bigger guilds would be too worried about getting or defending what they need to care. That's actually how it rolls on officials. Nobody bothers with the crap loot forts cept the small guilds.
All of the forts would be way way too much. Maybe five though, that would be a great number for heRO. It would allow for WoE growth. Numbers alone won't do it. When people join looking for a WoE guild they almost always end up in the established WoE guilds.