You will get a Scottish base as an F/O without too much grief .I wouldn't go lugging my family around the country ,It will come .
As regards a command , well a jet command in Scotland with EZY will still come much quicker than anywhere else bar perhaps Jet 2 ?
Commuting even between the Scottish bases on the easyJet roster is very very tiring .I wouldn't recommend it . e.g. if you are living on the west coast and get EDI then driving to EDI for 05:00 reports 5 days in a row and then driving home 12 hours later on the M8 in the rush hour is a brutal way to live .
As regards emailing them and asking , easyJet won't tell their own pilots the answer to questions like that so id be surprised if they tell someone who hasn't even attended an interview or got a job . (they don't know the answer anyway, so nothing they might on the off-chance tell you will be out of date the minute the words have been uttered .