Increase ult caste range?
I just find it particularly annoying that E is considerably longer than R range, so E->R combo always feels very risky, inconsistent, and discourages from doing it because if the enemy is slightly to far away, you just cast E then R but instead you just walk into R range while E finishes cast and you just waste E and end up ulting someone at max range effectively wasting ult as well. This would also add some actual synergy with morde's kit
Another idea that isn't really related but i still want to hear thoughts on is making ult and E like wild rift, reduce stat steal to 7 or 8% but give E a small slow