1) student canopies are often pretty unresponsive due to being relatively large.
For this reason - while you're on a large canopy - you may not get a lot of response to your flare test.
You landed fine - so you may need to recalibrate your expectations slightly on what a 'flaring properly' canopy feels like.
2) having said that, I don't know of a single skydiver who cut away from a good canopy and then died. I know of many skydivers who waited too long thinking that they could fix things - or that it might not be so bad, and who then died landing a bad canopy, or under a reserve that didn't have time to open.
This even extends to 'land-able' canopies that were not 100% right. A friend had a broken brake line. A more confident canopy pilot would have used rear risers, done a PLF and landed without incident. She was not a confident canopy pilot. She stressed out, made a rough landing and broke her ankle badly.
If she had cut away, then she would have almost certainly landed fine.
My mantra is 'chop early, chop often'.
Much better to make a mistake and chop away from something that was actually ok, than to try to land something that isn't.