I always defer to @tjkoyen and the other top-tier kart racers on KP for setup advice, but I have a few thought from a driving perspective.
I’ll start with a question; do you really ‘feel’ this is a problem, or are you being told from an external source that this is a problem? Your last race you were 0.06 off the lap record and 0.4 quicker than the field, right? So maybe this is not a problem or a big problem at all.
I know that in a private message I mentioned that you had a lot of steering inputs in one turn (number of back & forth inputs rather than an excessive quantity of one input direction), and that you added perhaps a bit too much mid-corner input on one turn to influence rotation so you could put the kart into the required trajectory to finish the turn at full throttle. I did notice a lot of steering input (understeer) in one turn, but I didn’t mention it because to me it didn’t seem to hinder your pace.
I always look first at how the kart rotates mid-turn. Is the rotation smooth, predictable, and with the right amount of rotational energy/velocity that you are able to manage the rotation as the kart transitions from understeer to a neutral or oversteer trajectory. This is critical because it determines how early, aggressively, and smoothly you can get back to throttle.
Next, I look if you are having to make any large compromises on corner entry to accomplish the rotation goal. For sure, you kart does understeer into apex (quite a bit on very tight turns in fact), but to the naked eye, it does not seem to be limiting your corner entry pace/performance.
Anyway, that’s just another perspective. It’s always good to question everything, and constantly look for potential improvements. So for sure, I would recommend trying TJ’s advice, because maybe you are actually compromising a few 0.01s on entry, or maybe the understeer is degrading your overall performance later in races, or maybe it will just feel better to you?
One last thought from a driving perspective; generally, throughout the entry phase of the turn you are losing speed (bleeding energy). To rotate the kart properly, you must arrive at the apex (rotation point) with the exact correct amount of energy/speed… that is you must run out of energy to hold the outside front tire at it’s optimum slip angle. When the energy needed to maintain the load on the front end runs out; the remaining energy ‘reflecting’ back to the chassis is what intensifies the kart’s rotational momentum and gives it the energy to transition from understeer to a neutral or oversteer trajectory.
So, it is possible you are arriving at the rotation point carrying a very small amount too speed, which would mean you carried a touch too much speed through the whole entry phase of the turn, which could cause you to understeer through the entry phase of the turn. Having watched the videos, I personally don’t think this is the case, but you could look through your data (especially for that very slow left hand turn on the track you drove last weekend) to see if there are any variances in mid-corner speed, and if so, how the variances influenced your throttle on point, throttle ramp-up rate, and overall corner exit (and following straight) performance. 
