At this rep range the top set is meaningless
No training stimulus. We can argue about that but 10-15 reps on what is supposed to be 3+ day is so far out of alignment that you're not on 5/3/1 anymore. You're on some kind of volume program.
No tracking of progress. Not everyone uses Wendler's formula. I do, and it works very well for me, so I must be in the middle of the bell curve. The OP mentioned it. Past 10 reps it does not work so well even for those of us for which it normally works. So you can't track progress.
Since it does not provide a stimulus and progress cannot be tracked, what else is there?
I'm sorry, the logic here is lost on me. There is no training stimulus when you lift for 10-15 reps? It might not be the same training stimulus as you get at 1, 2, 3, 5, etc. reps, but it certainly is one.
And how can you say cannot track progress? Just because some 1 rep max formula doesn't let you compare 10 x whatever as equal to 1 x somethingelse, big deal. Compare rep max to rep max for that weight - if you're doing, say, 225, and you get 10 x 225 and your previous best was 8 or 9 x 225, you've gotten stronger. That's practically a quote from the 5/3/1 manual, too - the idea is not to get too hung up on your 1 rep max. Instead you get some lower weight reps and get the most you can out of them.
Now, I'm totally fine with people progressing a little faster if they realize maybe their 1-rep max test day wasn't really a good day and they're ready for a larger increment. I've jumped people 20-25 points on their training max for multiple cycles on 5/3/1 when they came back after a strategic deload, because it was clear they were ready for it. But generally, I think it's not worth hurrying too much. You'll generally get more in the long run - IME - out of "a little too light for me today" than "a little too heavy for me today." Look at that weight and say, "how I can use this to get stronger?" instead of "can I lift heavier?" They can't all be max heavy days.