My questions are:
1. Will I be able to choose an E+ seat on the UA leg?
Yes
2. Will my *A Gold status give me any seat choice privileges on TAP (the TATL legs are on a TAP A330)? On JetBlue?
I am not familiar with what TAP offers seating wise, but given it is a "classic" fare you will be able to choose a seat with possible upcharge for specific highly sought after seats, if TAP operates like that. For the Jetblue segment, *gold will get you, nothing.
3. If I book this flight specifying my MP number, what will my MP miles credit be for this itinerary? 70% for all flights? Will I get mileage credit on JetBlue also, as it's a TAP codeshare?
No miles for the Jetblue segment, I would consult the Mileageplus chart on United.com https://www.united.com/cms/en-us/mar...spx?itemid=319 to determine mileage accrual based on your fare basis
Thanks for any insight.