There's a lot of timeouts in the log, but power and noise levels look OK: BQM looks as though there may be over-utilisation, but I can't see why that would occur because of a speed increase. User @jem101 knows more about these things than I do and may be able to comment.
Was the lag there before you upgraded, and if so, how long has it been going on, and what motivated you to upgrade?
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