I still love ya.
I dont know about the bonusses. The hidden "danger" is that being diverse and just trying/taking skills that you like etc, is being punished. Since you don't get any bonuses that way and thus its not worthwhile to be a jack of all trades.
Being diverse is probably already a bit punished trough gear. A pure warrior can go for strength+vitality and the heaviest of armors. A mage is going for intelligence and stuff. But a jack of all trades also needs to have all kind of stats.
And there are only a limited amount of skillpoints one gets, thus choices have to be made. Yes a battlemage is a bit of a warrior and a bit mage. But only a few specific mageskills etc.
