To be fair I did find EasyJet's Luton schedule a bit odd. Wouldn't run at all during the peak summer season where you could argue the demand was the highest, and not operating it at a high frequency compared to what Monarch offered. Anyway hope they will bring it back once demand rises again.
Edinburgh continues to be bookable from March 2021, although it isn't bookable after October unlike the other 3 routes they operate.