The Eastern borders were much more shaped locally than by the intervention of any of the winners, and the winners who actually had more boots on the ground there, were exactly the French.
So if the French get to play the fifth wheel at the conference table, I'd say for sure they won't be investing more blood out there. Which means the Poles get more of what they want, not less. Expect much more guerrilla, and "surprising" plebiscite results, without French troops there.
The Czechs probably don't get anything more, but certainly they don't get less than in OTL.
The French not getting their say at the peace conference, OTOH, has much more momentous consequences in terms of reparations and, especially, in the issue of the demilitarization of the Rheinland. It is possible the Germans get away with less reparations to pay, and it is almost certain there won't be a demilitarized zone. This may jump-start Hitler's mischief up to one year on advance on OTL schedule.
It is possible, but unlikely, that the Germans also are under fewer disarmament restrictions; in any case, that's not very important, since they cheated on them from day one.