Good points, Greg - and while they may be improving, you listed several issues that aptly illustrate why I can't stand a touchscreen only interface. The one that I can't ever see being resolved - the "bouncy" issue. When different touches/taps/gestures are required for different functions, these inputs will always be more difficult when things are not completely stationary.
Another touchscreen issue - clarity. Yes, screens have improved drastically in this regard, both in durability as well as the ability to display images when the underlying surface is not 100% clean. However, there's still quite a difference between a clean and not-so-clean screen...and with touchscreen only, they'll dirty up significantly faster.
Lastly, RE automatic routing - that's evidently not a technical hurdle, as Simrad offers it as well. Unfortunately, not in North America - yet. The leading theory/rumor being, that it's a recipe for lawsuits...but if so, that's obviously something Garmin has addressed to their attorneys' satisfaction. Simrad has automatic routing available for both Navionics and C-Map in other countries...which also illustrates another reason I'm looking at Simrad. I could be mistaken, but to my knowledge - nobody else offers your choice of cartography from both vendors in the same unit.