I disagree - his corners were generally poor but I fail to see how he could try harder which implies he was deliver settling for that level - I never understood why he always had to be our deadball man because with the exception of a couple of excellent pens there were very few free kicks and virtually no corners that suggested he should be the chosen one.
To be fair to Grimes I think the corners were designed to skim over the first player's head which would get into the six yard box at an uncomfortable height for the keeper and defence. JJOT has scored a few from these types but you've only got to be a little out and it does look poor. Simply lobbing balls onto the penalty area are going to be routinely dealt with by the keeper at this level.
The idea that a professional footballer can't sufficiently lift a ball for a corner is a bit daft.