Not sure that would have made much difference in the short run. Touching the leg in tachi-waza (ie standing throws) has been banned in judo for about five years, and many clubs (such as mine) still teach it (morote gari, all the drop kata-guruma versions where you touch the leg and which were standard judo until the ban).
In our club, and many others, the leg touches are still allowed in randori - it'll probably be a generation before they're no longer common in judo except for IJF shia. That's mainly because all the instructors (such as myself) learned and practiced those techniques for decades, and aren't going to stop just because some muddle heads in the IJF decide they aren't photogenic techniques. We occaisionally get visitors who complain, but most (including a couple visiting Olympians) go a long with it without comment - in fact, most say they're always happy to be able to use the old techniques.
For that matter, we still allow Kami basami (sissor throw as well) - and that's been banned for a long time.
I doubt Maeda would have cared any more about the banning of leg locks back then than we do about banning leg touches today. Things like that take a new generation of teachers to filter through.
