I'm sorry, Dave. I'm afraid I can't do that.
It is EXCEPTIONALLY modworthy. I would say that (IMO) the single greatest strength of the 5e is how adaptable and resilient the rules are.I actually talk about 5e and 4e in concert largely because i want to see how much of what I see as lost by 5e is actually lost and to what extent there are things I could bring back into it (hey it is supposed to be modworthy) Now some of what I want may not be possible because of some fundamental design choices, but I am not sure how much that might be true.
Which means two things-
1. To the extent you want to incorporate more "4e" stuff, you will either need to do the work yourself, or find someone who has done it for you.
2. To the extent that you appreciate the elegance of the 4e system as a unified whole, then it will be difficult to attach on to the 5e superstructure.
As I wrote, I have streamlined the game immensely by stripping away aspects of 5e, and incorporating bits from other RPGs (such as Amber) and from prior editions (usually B/X and 1e), but that's just for me- it's really the game that you want to run.