100% agree, which is why I don't see why people think he will end up on the Marlies.
If he does play for the Marlies, it will either be for a very brief time at the beginning of the year until injuries hit or we trade Engvall (whichever comes first), or it will mostly just be the odd tune up game like it was for Barabanov and Marincin when they sat for extended periods of time.
He will be in the NHL for close to 100% of the time, or we will trade him like we did with Lindholm and Barabanov.
What I find interesting is that Mikheyev and Semyonov have played on the same team, in similar roles, for much of their lives (born 3 weeks apart, both in Omsk, and have come up through that system together) and have yet to play on the same line together in preseason. You'd think the Leafs would capitalize on that chemistry to some extent (unless they hate each other for some reason, in which case it would be odd for Semyonov to sign here in the first place).