They seem to be on the warpath against internal synergy, because apparently CD sync was too complex a concept for the average player and rewarding those with some degree of internal mechanical acumen was discouraging less insightful or otherwise disengaged players...

Thus the ceiling may well be reduced. But, that doesn't say anything about the floor.
For all I can tell, even if SE created a zero-synergy arsenal of damage abilities that one could roll their face around on or just key-pace back and forth over for optimal damage, many players would still neglect to even use them.