Luke was naturally resistant to A.I., and had never thought of roping in Vision.
Besides, Vision was at least half of Jarvis, and had the face of Jarvis, Howard Stark's butler.
Given that was the case, Luke felt it was gauche to steal Vision from Tony.
Thus, the Avengers now had a reserve member and two 'quasi members.'
These three still had a lot of issues that needed to be solved slowly, but they were all very strong.
No matter how good Natasha and Hawkeye were, they couldn't compare with the Hulk and Thor in a head-on clash, but these three could.
One was a combination of a vibranium body, the Mind Stone, and artificial intelligence, and could fly, fight, resist, and pass through walls – his abilities were over the top.
Wanda and Pietro weren't all-rounders.
However, the little witch's violent output and mental abilities were top-notch.