Yes and it will make your scheduling of LLMP and/or LLSP simpler and less stressful. You don't need quite all the items you listed. You don't need to link tickets or even duplicate everyone in both MDE accounts.Can my wife create her own Disney account, link all our information including tickets and party, and make reservations for 3 days out of 7 while I make the reservations for the other 4 days? Is that recommended or might glitch the app and cause more issues?
You currently have everyone in MDE account and you "manage" tickets, resort, and LLMP and/or LLSP for all. As @LKing suggested spend a little time review the thread listed and let us know when you have further questions.
Dave