Nice list. It looks very flexible and fun. I haven't been playing hardly at all, but I was testing a similar style list for a bit that seemed like it had a lot of potential. Basically, I was a little more all-in on the speed with a less flexibility.
I ended up there, because Top, while good, was still a bit awkward sometimes and a mana sink when what I really wanted was business. So, I went with more DD and more Dark Petition and no tops, relying on the Petitions to get Gush (or DD if I already had Gush in hand) to get into the pile. It worked quite well, usually winning by turn 3 or 4 after a duress or 2. Also, the additional moxen allowed for a more liberal use of Defense Grid.
It fared well against the field, even against Shops pre-thorn restriction (I haven't played since the restriction, so I don't know how much that changed things, but I assume the matchup is easier now). it had a good matchup against Oath due its speed. There's probably a great list somewhere in the middle of your list and this one, but I didn't have a lot of the cards to work with, because I had to proxy a bunch of stuff, including some of the lands.
As for the 4x Drits. IMO, DD can be either a control or combo deck. The Drit count depends on which you're playing. Soly and Steve tended to the more controlling versions for a long time, and with good results, which is why they advocated toward fewer Drits. I'm not nearly as good of a control player as they are and didn't have the same level of success, so I went with the combo version and, thus, 4 Drits, but it really comes down to personal preference and meta. As soly said, the meta right now seems better suited to the combo version than the control version. Additionally, the loss of gush as 4-of makes it harder for the control version to double-dip on Gush as both a combo piece and a draw engine.
Good luck with the list.