So thinking about it and the functions handled by the stalks and how they change:
Turn signaling - the buttons are convenient only if your hand is in a specific spot on the wheel. They move with the wheel so they're not in a consistent spot. if your hand isn't on the wheel at the 8-9 o'clock position you need to search for them. If you have gloves or a band-aid on they don't work. Holding the button down in FSD is problematic. Verdict: inferior
(As an anecdotal example, I was driving, started to get turn and then realized I was in the wrong lane and needed to merge back. I had started to turn and my hands were not in the 'standard' location on the wheel and I had a split second to check traffic and activate the turn signal to let people know I was merging back before it was too late. The button utterly failed in this situation.)
Wipers - The button works in the same manner as the button on the stalk but is moved to the right side. The same issues apply here as listed above but the need to activate the wipers at a specific time is less than with the turn signal. Verdict: slightly inferior
High beams: Pushing the button flashes the hight beams, holding the button for a set duration turns them on. If you want to flash your beams (to let someone know they have their high beams on for example) the stalk is easier to find. 'double clicking' the button may be a tad easier. Turning high beams on with the stalk is a quicker action. The other drawbacks with the buttons still apply. High beams are not a frequent use item so the impact is minimal. Verdict: slightly inferior but likely not enough to quibble about.
Gear Selection: For the stalkless a control appears on the screen when you press the brake. You swipe up for drive, down for reverse. While driving you press and hold for park. Neutral is a separate button lower down. There are also physical buttons above the rear view mirror. There is also an auto-shift feature. I haven't tried this to know how good it is. (Based on my experience with other automatic features Tesla has introduced I'm skeptical but this is conjecture on my part.) To activate the emergency brake while driving you press and hold the stalk button. For the stalkless version you have to press and hold P on the screen. The stalk is clearly more convenient, particularly if you're maneuvering as you do with parallel parking. If you need to use the emergency brake reaching and holding a soft button on the screen is problematic but this is such a rare use case that I don't think it comes into play. Verdict: Inferior
TACC/AP/FSD Activation: has moved from the stalk to the right scroll wheel button. (this also necessitated a separate button for voice commands.) it can be argued that using the stalk for both gear selection and TACC/FSD/AP activation is confusing so in this respect, separating them makes it more clear. (Personally, I've never had an issue and I haven't seen reports of issues.) Moving the voice command button make it slightly less convenient but not enough to worry about. Verdict: Neutral to slight improvement.
So yeah. no improvement, clear drawbacks = bad design.