Approach shoes are a bit of a one trick pony with the exception of a few offerings that might make decent dayhike shoes with more technicality on slab. Multi day backpacks on routes with wide surface variation? I think there are better options than approach shoes. The use of sticky rubber shoes allows for great slabbing on short approach hikes from car to the crag, but are pretty shitty for just about everything else considering most of the shoes that incorporate stealth rubber have relatively flat outsoles. Holding the Lone Peaks up to an approach shoes ability to negotiate granite and easy class climbing and bouldering is slighlty lopsided, considering the shoe was intended to be a running shoe, one that works very well within that context. The Lone Peak in the context of backpacking appears to be up to the task for the most part, with the drawbacks being long term durability.
ahhh ... but i did mention approach shoes are SPECIFICALLY for what are basically scrambles ... places where your rubber cant slip or yr screwed, excuse the pun
for trails theres plenty of other options ...
but you do have to remember that there is plenty of wiggle room in "approach shoes" ... some have a deeper tread pattern, most are quite durable
most though do have upper leathers, though there are a few with mesh
in reality they are not too different from light hikers many people use, but with better traction on rock and better climbing
the point is simply if youre going to be using trail runners shoes in boulder fields, scree, slabs, rock faces,jamming them into easy cracks, etc ... they will get TRASHED
now fit is a personal choice, but ask yourself if theres another shoe that isnt more durable, that wouldnt work just as well for what you want to do
if youre using a shoe in high wear/abrasion activities ... perhaps something a bit tougher, and im not saying get boots, would be in order?