I think they just put all their eggs into frostbite and that bit them in the ass coz they didn't want to get it working on switch at first, and stick to bad bets when the writing is on the wall and admit they were wrong. Like releasing a Destiny like game 5 years later in Anthem when console GaaS is saturated, forcing their third person games (DA:I and ME:A) to run frostbite and now watching multiple major third parties do well on switch with their only title being what, fifa?
Madden, PvZ would do well on switch, and they have plenty of last gen or mobile games they could port but they just don't want to do it.