Awesome results
Regarding tyre wear: the tyre longevity is set the way it is because if they wear any faster, or last any shorter, you wind up with races where you're using the softs to start, but are forced to use the hard compound to make the race distance. So the way the tyres are set to wear now results in some races where you'll actually need to force a 2 stop strategy despite being put on a 3 stop.
For instance I did a 50% race on Legend at Canada earlier today. The game put me on a 3 stop strategy: super soft to start, medium, medium, super soft. I start racing and come lap 5 when I'm supposed to pit, my race engineer comes on saying Vettel is going to pit in a couple laps. So I stay out and pit on lap 7 with Vettel...laps later I found the AI is on a 2 stop strategy: super soft, medium, medium.
So I adjust and race on their strategy, and barely held off Vettel at the end of the race with a 0.6 second lead.
So some races you'll pit according to schedule, and some you'll need to adjust in order to stay competitive
However, if you really want to increase tyre wear:
Open the database.bin file located at F1 2012\Database
Find the "tyres" table and adjust the max_distance values for each compound. Don't go too much lower than my values though, or the AI will not be able to make it to the end of the race, and will never pit.
To confirm you're not setting the values too low, you can do a quick, race only event and check the race strategy screen. if no pitstops are scheduled, you've set the tyre compounds too low.
Cheers