
1. Reduce inertia when doing smaller movement with left, right, up and down arrows(ie. when not running large distance and quickly changing side etc.)
2. Reduce the power of 1st serve slightly(or make it slightly harder to aim right on lines,) and/or make them go in slightly less often, especially when hitting second serve with acceleration
3. Reduce the effectiveness of serve and volley tactic somewhat(volleying in rallies is fine as is) and remove a volley that is hit with fire 1+up(not always successful though) that goes short and is extremely hard to get(although suggestion n.2 might do the trick as well in reducing effectiveness of s&v)
4. Reduce the effectiveness of dropshots(at high skill points) slightly by for example making them fly a little longer when hit against harder shots
5. Make badly positioned shots hit with topspin shot, normal strike and slice weaker, maybe by having them be slower flying and less short and low(as those are quite difficult to hit against), or shorter and loopier, so that it is always favorable to attempt good positioning, and there's larger penalty for bad positioning even when hitting other than acceleration
6. Make accelerating somewhat more effective on clay(to make it atleast a little viable against spin, especially on low ping)
7. Do something to make the game play more equal on all pings(preferably make the low pings more like mid/high pings, and not other way around, so rallies aren't too long)