This "solution" can really only be proposed by someone who has not played sports. This would simply result in women being unable to compete in sports professionally, outside of a couple small niches like ultra long distance swimming and a couple sub-disciplines of gymnastics.
I do not consider that to be a good thing.
It really depends on the way classes are divided. Dismissing the general concept demonstrates a fear of change rather than a legitimate openness to fair play.
No it doesn't, and no it doesn't. Proposing this concept demonstrates a profound ignorance of what competition at the top level of sports actually looks like.
The concept is just bad, unless your goal is to prevent women from being able to make a living playing professional sports.
The thing is, we're already using a scissor for ability, just a poor one with the exact problem you describe - it renders trans women unable to make a living playing professional sports. Throwing one group under the bus for another cannot be avoided so long as sex or gender are part of sports divisions.
Please let go of the need for this.
You are clearly out of your depth. Have you ever competed in high level sports? Please don't speak on things you know nothing about. It takes a lot of gall to tell someone 'please let go of the need for this' when they are pointing this out. I will do no such thing, but I likely will give up trying to educate you.
I won't respond further unless you pick an example sport, and propose how your "scissor for ability" would work, in concrete detail. If you do this, I will be happy to explain why this would result in neither women _nor trans women_ having any chance to make a living as professional athletes.
I have competed in reasonably high level sports, and my wife was US Masters duathlete of the year a few years ago (with me as her coach). I think you're wrong, though it's easy to see why.
Currently, with sex-based categories, a woman can be declared "the best in the world" and most people won't waste much time on the question "yeah, but could she beat the best men?" (granted, some will). They will accept that, e.g. she has the fastest time over 26.2 miles in the world right now, even though a few hundred or a few thousand men worldwide are faster.
If you use performance based metrics to create the categories (the way that road cycling does, for example, though still within gender divisions), that "title" would go away, and likely a woman would only be "the best in the world in division X", other than in (as you noted) some endurance, climbing and gymnastics sports where an elite subset of women could potentially be the best of "top" category.
It isn't completely obvious that this is a negative - how much of a change it would be would depend on a lot of other changes (or lack thereof) in how sport was organized. Certainly if it continued to focus on only the top division, then women would be shut out of most opportunities to be professional. But that's not inherent in the design. I do concede, however, that it is quite a likely outcome of such a category structure.
Let's use the present scissor and the current state of affairs, which at present excludes some women for the sake of others. Which, I'll remind you, comes with all of the problems we currently experience.