Apex Season 1 NV literally got lucky with Mickie and the meta (at the time was 3+ tank, S76, Ana/Lucio) literally falling into their lap, it couldn't have worked out better for them and they knew it. Talespin was a 1 trick Pharah player so he had to go but Mickie did not fill the gaps that NV needed, they were already completely and utterly stacked at that point in time.
I like Mickie on MT more than OT because his DVA was clearly not doing the job, but I definitely think the MT position is something the Fuel are going to need to keep looking at. You can't have 3+ "maybe" main tank players on your team. Taimou, cocco, Mickie ... which one is it going to be? We are at the half way point of OWL, it's time to finally iron out the starting rotation. They have a really great potential starting core of:
Bird - DVA/OT flex
Rascal - DPS, caller
EFFECT - DPS, flex OT if needed
Custa - IGL/support
chips - support