(I can not do anything about the kissing looking weird for sims with different heights etc, as this requires to change the animations a LOT, and if it were easy i would think the sims team would have already implemented it) Only thing new is that the animation is no longer as funny looking.
This is a height slider based on simmythesim first height slider. Remove the old one and place this in your mods folder unzipped I added the fix to one of my downloads (heightslidertoddlerfix), and will hopefully add it them all once I have more time.
A toddlerfix is made by vectorplexus for the old sliders by simmythesim.