D&D brought out 5th Edition because they realized they ROYALLY pissed off their fans with 4th. They brought out 4th because they'd run through pretty much all the material they could without getting into real shark-jumping territory. Their mistake is that, unlike games such as Hero System, which has had the same basic mechanic from at least 4th edition all the way to 6th, with some minor tweaks, they decided to strip out over half the rulebook, and change everything. Take any Hero character's 4th ed stats, and it is fairly straightforward to convert them to 6th ed. Take a D&D character's 3.5 stats, and you need to get a lobotomy to convert them and be satisfied with the results.
That, above all, is the lesson Catalyst should learn from D&D. You have a good, fairly simple mechanic here, that is pretty easy to design any kind of character you like, but doesn't treat more advanced players like their twelve years old.