"That's something I haven't seen in a while" watching a season 10 game lmao.
There was a problem with your mic catching your exhales but it wasn't huge. Most of the stuff you aren't doing well seem like they would take care of themselves with a bit of practice/having a second caster to take some of the load so you aren't having to talk 24/7. You stumble over a few words here and there as well as having a few "uhms". Specifically you seem to use the phrase "it seems" pretty often. When you start speaking faster it gets a little tough to understand what you are saying.
Overall with a bit of practice I could see you being an excellent addition to the tftv casting staff.