" ankle protection is a must despite plenty of videos out there saying reduce your footware weight and walk in sandshoes to minimise fuel (food) usage. "
Anyone who thinks that is either (a) true, or (b) the reason to wear light footwear is a nutter IMO. This is a well-beaten dead horse on here, but just to give it one more whack – the reason to wear lighter shoes is in fact to protect your ankles. The resolution of this bit of paradox will only become apparent if you try both for extended periods of time on the same terrain. Or course all within reason. What a lot of us former boot users have found is that (especially for trail use) boots decrease the sensitivity and hence increase the proprioceptive feedback time. In short you have FAR fewer little stumbles and slips with lighter shoes, and therefore the 1 out of 500 that leads to a big slip are also fewer. So wearing light shoes decreases the chance you will stumble greatly and injure yourself. Further, there is also a very convincing argument that for the kinds of slips that will lead to an ankle injury the types of boots we are talking about here are not going to protect your ankles anyway. So PREVENTING the slips is the best way to protect you ankles – so lighter shoes. That, together with hiking poles I find is a far safer solution for you ankles, leaving aside ALL other issue, both real and imagined.
The issue of keeping your feet dry is also a problematical with gortex – it holds water in better as well – so absolutely terrible in hot weather. As to keeping the external water out, this might work if all the water is below your ankle, but that is not very usual on a trip where you cross streams, and a trip without any stream crossings is either a very tame one indeed, or else possibly one where you don't want to use gortex anyway. Once the water gets in there at all then the are much worse than more breathable shoes.
Light weight shoes are also a tremendous benefit in lowering fatigue. But for its OWN sake. The reason is not so you can save more weight by carrying less food. I've seen that assertion, and it is crazy IMO, so every once in a while it may be good the flog the dead horse a few times, if only to kill a few worms.
The only real issue is how much support (shape and thickness) you feel your SOLES need for your feet, where you will be walking.
Gortex liners probably ARE a good solution for snow. But getting your feet a little wet in warmer conditions is far less of an issue that making sure they dry out quickly.