Should have started before the Halloween break to a boost.. we are now in the lull before Christmas when numbers drop across all flights, nevermind COVID impacting numbers travelling and people using credit with easyJet / Jet2 / moved flights from the last 18 months etc for holidays..
If the route survives until things recover, it should do well in the busier months... year round.. that could be tricky unless they get competitive with pricing, but then that impact the yield... EI previously tried BFS>CDG at the same time as EZY and the numbers weren't great, that was in better times for travel as well.. I know Vueling is ORY, but not overly sure it being a different airport will do much for swaying people on that front.. both reasonably similar in distance to the Centre of Paris and Disney.
Time will tell I guess