Maya was desperate to stop Sensei from dying right in front of her, after nearly breaking him, but that's not quite the same as laying her head on his shoulder on her bday towards the end of Chapter 2:
Or almost risking everything to kiss him, like in Chapter 3:
She didn't want Current Sensei to die, sure, but she still had a ways to go before she'd reach the level she did.
On the other hand, Maya had wanted Noriko gone since the 'What Could Have Been' Chapter 2 Main Event, where she had her outburst:
Which was about 4 updates, before 'Record Breaker'.
Maya wanting to get rid of Noriko also isn't something new. Noriko didn't seem to think Maya's opinion of her changed much from apparently their tutoring days, after Maya's outburst:
It's probably why Sensei just considers it a grudge in 'Record Breaker':