Sure, they do provide some level of stabilizing, but what bothers me is that upgrading to electric stabilizers is expensive compared to basic scissor jacks and there's some degree of expectation that they are better. Then it turns out that the old tried and true basic scissor jacks aren't all that bad after all (at least for vertical bounce/movement).
If you look closely at how the electric stabilizers flex and move around, if they wanted to, they could use thicker steel and stonger pivot bolts, but they build them the lightest and cheapest possible. It's surprising to see how much movement there is at the pivot bolt where the angle braces connect to the leg.
Not arguing, just my 2 cents as an engineer. Things that are designed to be minimalist bug me, and when it comes to TTs, it not just the stabilizers that are like that.
One of these days I am going to see what I can do to reinforce and beef up our elec. stabilizers. I even thought about trying to get the UltraFab Power Twin elec. stabilizers on our latest TT since they claim it stops side to side and front to back motion, but it looks fairly similar to the Lippert one and I decided against them.