If the majority likes to make changes to ensure more strategy options I'd support the idea of testing tyre wear x2.
During the season I found it a bit unrealistic to drive the fastest laps with low fuel but on tyres wich had been used more than half of the race. This doesn't feel balanced and makes it impossible to go into the pits earlier to avoid traffic and possibly undercut the opponent in front or to put him under pressure.
I asume that tyre wear x2 would still allow to handle the car in the end of the stint when going for a 1-stopper but make it a bigger challenge, which seems logical to me. If that would mean that a 2-stopper would be the safest and most common choice then, we could also (re-)introduce the pit speed limit so the 2-stoppers would pay their safer strategy with a longer pit time then.
I can imagine to have a test race on a wednesday and on one of the last tracks from Season 10 using the same old settings but tyre wear x2. Half of the field should go for a 1-stopper and half of the field should go for a 2-stopper. To ensure that nobody knows about the predefined strategy of his opponents, a third person who doesn't take part could randomly tell the signed up drivers via PM which strategy to go for.
I think you did a small miscalculation about the effect of tirewear x2.
With this setting you would use your tires more with a 2 stopper than you would atm with a 1 stopper. A 3 stopper would be the exact equivalent to the current 1 stopper in terms of tireuse.
But that's exactly the reason why I've suggested the higher tirewear, because the tires aren't getting really used well atm. I miss this aspect from the MMG F1 season where you actually used most of the life of your tires, which was more exciting in my opinion
edit: also I'm not for the fuel x0 thing, as the way the car changes its balance over the course of a changing fuel-load is a very exciting aspect of racing in my opinion and I would really miss that.