Hey Sarah, I should have made myself clearer! When I say I love the conservatoire style, I mean I love the style of teaching I am receiving at the conservatoire - as Kerioboe has pointed out, this varies from conservatoire to conservatoire. I'm lucky to live in a large city in France that has a conservatoire with an excellent reputation (especially for strings) and have thus found the people at the same level as me to be excellent sight readers, but then the strings section place a HUGE emphasis on this (no slowing down or missing bits out - you play it all, or you go down a level in the sight reading material until you find a level you can play it all at and you work your way up from there).
The idea of working on selected pieces is again an innovation of the strings section, they have selected a range of pieces for each cycle (of three or four - or two(!) years) that create intentional stopping points - or give brilliant students the chance to show that they don't have any stopping points (not my case, sadly

) then sets of corresponding exercises (usually a kreutzer or something along those lines, some are a little odder like breathing out at each bow change or playing something whilst reciting a tongue twister...

or - my personal favourite - play something and sing the left hand of the piano part at the same time... needless to say it rarely works first time!) - and they won't let you complete the piece until the stopping point is perfected.
I personally prefer the conservatoire system, but I still want to work on ABRSM grades and my teacher has kindly said he'll listen to pieces at each lesson in addition to his planned work to see how they're coming on - but essentially I'm on my own there.
The downside of the conservatoire is that frequently, you get rather pompous people milling around who think they're special because they've done the diplôme de fin d'études or somesuch - like the pianist who accompanies my lessons (yep, I get a teacher and a pianist all to myself each week!) who insists on glaring at me each time I make a wrong note (this happens a lot, as you can imagine) in a really exasperated way... I swear if I started slapping him I'd never stop! I have visions of me being removed from the conservatoire by my elbows by two burly gendarmes...
To approach things in the same way, try bringing some pieces up to performance standard and, whenever you hit a stopping point, find an exercise on violinmasterclass or something and work at it until it isn't a stopping point.
Or you could move to Nantes (and then we could do that Harmonic deal we talked about... hopeful face...)
Allan