There is another serious point about the name I haven't yet seen any comments on.

Grep the open source project has spent years building up it's name and it's good will by being - as you point out - a great tool.

You are now attempting to claim some of that good will just by copying the name when you have nothing to do with grep.

If you did that to a commercial company they'd sue you for trademark infringement.

(Hopefully this is a serious enough point to not count as a "tangential annoyance")