Teoscar was coming off a 4 WAR season in 2021 (132 wRC+) and 3 WAR season in 2022 (130 wRC+). During the pandemic season, he had a 1.4 WAR and 142 wRC+ in 50 games. That's a pretty good track record. If you think trading that sort of bat for a 29 year old RP with 1 good season in his career is a good decision in isolation, then we'll have to agree to disagree. This has nothing to do with the follow-up. If you want to look at the WAR component between Teo, KK, Belt, Gurriel, etc, then that's a different discussion. I'm talking about just the logic of the trade itself. Swanson had a 0.9 fWAR last season. You know who also had a 0.9 fWAR in 2023? Julian Merryweather, a reliever the Jays let go for nothing to clear up a 40 man roster spot. That's how volatile and unpredictable relievers are year to year. Again, the reason why the Jays spent $21m on Green, $16m on Jimi, traded Teo for Swanson, traded Frasso for White, etc, etc, is because of the development issues we have discussed. That's the bigger issue here than the trade itself.
I don't think trading Vlad for a RP after this season is a valid comparison. If Vlad's 2024 resembles his 2023, then he'd be no where near as valuable as Teoscar was in the 2 years preceding that trade. Vlad would legit be a salary dump in that scenario.