Hey there,
Not meaning to cause trouble but…. (us two are trek lush buddies so I think I can say this).
What’s wrong with your Trek? You seem to enjoy riding it, and from what I recall, for the sort of riding you do it seems perfect. Are you wanting a new bike just because n+1 feeling?
Do you want longer travel? If so, you’ll have to accept extra weight and all that comes with it but do you really need it?
I have limited experience as I have limited choices but feel that the Trek Lush is a great versatile bike. I bought a carbon lush second hand and it is hugely better for me than the Lush S. I think this is partly better suspension but I do feel the frame is stiffer, more fun and a little lighter (I think the weight saving is similar to the weight gained with larger tyres). This bike has seen me through MTBO racing, a hike-a-bike adventure in the Alps and Scotland and only really met it’s match at the Ard Rock Enduro though I think for the latter I just needed to adjust the suspension.
The only downside of the Trek Lush carbon IMHO is that it is too damn good at everything to justify another bike. It’s light enough to race, and for light mincers like me big enough to be comfortable on big adventures.
We should look out for each other again for a Lush meet-up. This year in the Alps I got to ride with another trek lush SL lady. She had an ace time too 🙂