So in the interests of full disclosure, I went ahead and got the Ultimate Founders’ Pack and have been really glad I did. All it would take would be a few $20 heroes and I would have been close to spending the same money, regardless. So far, I have completed the story with Thor(lvl 27) and Cyclops(lvl 29) and am about halfway through with the story with the Hulk (lvl 18) and have also played Captain America and Scarlet Witch.
The most shocking thing so far is how well the actually captured the spirit of the character in the way their on-screen counterparts play. Cyclops and Capt. America make really great grouping characters (although I solo’ed most of the time with them regardless, they actually shine in the auto-groups instances put together for you). The Hulk playstyle makes such a mess I actually had one auto-group drop me before we even made it past the first room of the instance because “we don’t like how messy the Hulk makes things”; well go tell it to the mountain, brother, that’s been the story of Hulk since his inception.
They are still working through a number of bugs. Secure trading and a patch to buff defense for the melee-only tank characters (Thing, Hulk, Colossus) are in the offing as well.
The above article quoted by ineffablebob from John Walker of RPS is at least somewhat incorrect: There are attributes to boost, only its not done in the same manner or method as most ARPGs. When one brings up your character screen, look at the top right, there you will find attributes such as Strength, Durability, Intelligence, Fighting, etc. These have ranks that unlock as you level or can be added by items added to your costume of choice.
It makes for another avenue of balancing. When you look at the Hulk, he has been described as “overpowered”, and to be sure, he is powerful. As at least part of the counterbalance to that, he also had a huge experience penalty (-15%) brought on by his “low” Intelligence score.