It depends. I tend to stick fairly close to the changes myself, although I do throw in a few subs. But some changes are better than others. Haven't seen the Hal Leonard changes. If they are awful, I would advocate for modification. My Real Book has quite a few penciled in remarks and edits. It probably needs a lot more, as some of the progressions are pretty bad IMHO.
Personally I like the idea of always trying to stretch a little. So I like to play with people who are better than I, if possible. But there are limits to this idea. I tend to feel really anxious and subconscious whenever I am working with a truly authentic jazzer. I am perfectly comfortable with other jazz clowns as long as they can actually play and know the tunes. Many are totally clueless. They suck and don't even realize it. But oddly they are often good enough to get regular gigs. Back when I was still active, my attitude was the gig had to pay well or I had to enjoy it. The worse the gig sucked, the better it had to pay, and vice versa.
So you have to weigh the merits of the situation and decide what to do. My take is you really find this sort of limitation very distasteful, but there may be other reasons to stay in the group. For example, maybe no better players are available in your area. You can chose to stay and do nothing, choose to stay and try to bring your bandmates along, or you can decide to pursue some green grass in another location.
As far as whether you try to bring you bandmates along, or not. IMHO that depends largely on if they are receptive. If they are not receptive, then there is not really much you can or should do about it, except factor their attitude into the decision to stay or go. If your bandmates are open to growth, I think you probably are experienced enough to know that it can be a long and arduous process, so try to have realistic expectations.
Also legit players tend to have different aptitudes, priorities, and mental processes than jazzers. IMHO these two groups seem to comprehend and process music in unique ways. I think of myself as someone who did both competently, but I did not excel at either. If you are working with someone who is more of a legit player, there are usually pretty severe limits to how much the can grow towards being a jazzer.