Your way of thinking really puzzles me some times. (who am I kidding, basically all of the time). Garcia had a great stretch of games over nearly 2 months, and as soon as he gives up runs in back to back outings the crap about DFA'ing him comes back. Apparently two games where the batted balls fall in for hits is enough to cancel out two months of work where he was a key member of a shutdown pen.
What's this middle reliever nonsense you keep stating? Garcia has been very good in high leverage situations, 2.64 FIP, 11.57 K/9, and only a tiny bit better in medium leverage situations, 2.60 FIP, 9.82 K/9. The young arms can be held as depth pieces in case of injury or underperformance.
You seemed to have missed that the Blue Jays are already a luxury tax team. Pinching pennies on Garcia won't necessarily save them anything based on what relievers are being paid in free agency now, and there's no guarantee any of the young relievers working their way up through the system are going to be even as good as Garcia, let alone improving on what he has to offer.