There's a few big flaws in your logic here. Firstly, the crysarium was really just another exp leveling system with a fancy and unique paint job. Second, there was NO customization involved in any of those systems. Your goal was ultimately to buy everything avialable.

The third and most important problem is that it is about 4 or 5 years too late to use a fancy leveling system like those in FFXIV. It's far too late to change that when some players have been building their character on the current mechanic for over 3 years now.

On the other hand, if you are talking about some sort of talent tree system that works in tandem with the current leveling system, I believe there are very good reasons why SE chose not to include that sort of function in this game, and it's much better for it. In the end there is little or no customization in those systems. There's a right way to spec and there's "you gimped yourself".