Yes, time flies, and lots of good experience related here and there.
I had no previous experience with trigger shifters (till I got the RidgeRunner, which has the Shimano type), so good to get some starting suggestions to try that had some chance of success. These are inexpensive enough.
I did damage the front trigger shifter by shifting it with the cable loose, and it jammed up. I took it apart to figure out what happened, and the loose "end" of the cable inside got bent and jammed. The shifter is not damaged, but the cable is. However, I've no idea how to reassemble one of these shifters, parts popped out when I opened it, which I expected, but I wanted to understand what happened. So I just bought a second set and now I have a spare rear shifter, and spare parts for the front one, for $23 Amazon second day.
The Domino throttle is very nice, slightly less throw, softer grippier rubber, a switch on release that might be useful, but the body is larger diameter. There's a section that has a cut for clearance, it might work out, my first tries did not, but since then I've had to rotate things some so I should look again and see if it is now possible. I'd still get one to have in your parts kit, it might not fit on this bike, but it is a nice throttle.
I've had no trouble with the two Magura's I have used, but I do keep them out of the rain.
The pot in the Domino is rated IP67 so it might be more reliable. I'm running one of each now, the difference is immediately noticeable when bare handed, but I won't ride that way, with gloves the differences are less noticeable. The grippier Domino is slightly easier to keep where you want it, and the reduced throw is nice for the wrist.
Perhaps some grease or O rings on the Magura would improve it, the only major complaint I've heard is weather getting in the pot.