The body and neck are both Phils? Thing is, fender necks are made from square material. The heel shouldn't have any taper in it at all. If the neck was made with the heel following the taper of the neck it will have a very slight back angle, whereas an original is dead flat in relation to the fingerboard to body, which is where I would say the problem lies. You need to shim the bridge up with some 4mm acoustic side material for example. Deepening the pocket will put the strings very close to the body which can be bad news if you do any slap/pop stuff. Your fingers will get trapped between string and body every time you pop one out.