I also thought it would ruin the fun learning engi and didn't see the reason to have it added in the first place. Turns out it was added to give engi more mobility for another mode (I wouldn't say he was lacking that as bullets can make you go really fast). Since there was a bit of focus on engi I thought it might be nice to try and tackle the most annoying part of sentry jumping (IMO), which is the RNG-fest of trying to get enough distance/height on long straights. A wrangled sentry normally has a spread of a 3? cone, so I lowered it to 1.5? instead which I think feels good. It doesn't seem to ruin short/medium distances since you'd normally get hit by enough bullets to clear those ranges anyway. So it's only for long ranges it comes into effect and it made me feel way more in control. I also tried without spread, but that made getting a good start inconsequential since you could always get more speed later in the air.
Also as a side-note: hard walls last is possible even without this change. You can place a sentry above the start of the jump and bullet jump to the end. It requires a lot of luck though and I haven't done it before without having a save on my sentry since I didn't want to go through the destroy-build-get on dispenser-destroy-build-upgrade cycle every attempt.