@rainbowgirl , I'm about to fly them on LAX/SEA and GEG/SEA/LAX on a range of aircraft types, so will be posting my thoughts in a TR that I'll be doing. If I had an issue with them, I wouldn't be flying with them - or subjecting my wife and kids either. Full service (to my mind) is the only way to go, I have no desire to use USA LCC's.
Details about Delta here:
DELTA AIR LINES Travel with Delta Air Lines and set your Velocity Points flying
Regarding the calculation of status credits and points, check that the fare class meets the earning eligibility:
https://velocityfrequentflyer.com/content/Info/StatusEarnFareClass/
VA International Long-haul: Elevate/Getaway fares are the following classes: S, T, Q, V, N. E, L, G
Delta Air Lines (DL) Discount Economy: L, U, T, X, V, E, S, H, Q, K
So only book fares starting with those letters.
Then use the mileage calculator for each flight:
https://velocityfrequentflyer.com/content/Earn/Airlines/mileage-calculator/
and finally check this page to to see the amount of status credits earned for each flight:
Earn Tables
The second table is for VA International flights and the 3rd table is for DL flights.
Finally, the importance of family pooling here:
TAKE ADVANTAGE OF VELOCITY'S UNIQUE FAMILY BENEFITS (how do you think I retain Gold every year and sometimes get Platinum
)