Airspace around Wycombe is restricted to the South East by Heathrow but apart from that isn't too bad. With the Farnborough LARS and Benson nearby there'll be plenty of radar people to talk to if you want to. Out to the north there's loads of space to play without too much height restriction. Stapleford does have Luton, London City and Stansted to contend with.
AAA Ltd MD is, as was before the Arora connection, a BA pilot. The BA director of ground ops is now an ex-director of ground ops having recently retired.
As gpn01 said, it is busy here at Wycombe, but you soon get used to it and aren't worried about going anywhere else that's 'busy'. At some time during the training there'll be a northerly or southerly wind so you'll also get used to operating from grass on 17/35 (there's also a parallel grass runway for 24/06).
Many people are put off by things 'out of their ordinary' like full ATC or conversely short(er) grass strips, co-located gliding/para dropping etc but most of the time once you bite the bullet and have a go it isn't a problem in reality.