The big difference here is that we're not just combining the imbues as they currently stand - we're putting a ton of dice out there in a huge variety of new places. If we weren't supporting the system at all with set, filigree, augments, destinies, new character abilities, spells, etc, then sure, we can aim for each tree to generally arrive at the same location. But we're not doing that, we're building an ecosystem where a player can build a strong proc from many disparate parts (the same way that players build the rest of their DPS from many disparate parts across many sources) which means that each part needs to be a small proportion of the whole.