As you say:
- You don't want to use the LTS because you would be "losing a lot of neat features";
- You don't like "the release of another version every 6 months";
- And you propose to move to a yearly release cycle.
This is already available. You don't have
to upgrade every 6 months; each release is at least support for 18 months. So you can just upgrade only once per year. Nobody is twisting your arm to upgrade to Linux Mint 12 when it comes out in November--you can happily continue to use Linux Mint 9, 10 and 11 as these all remain supported (at least) until the release of Linux Mint 13
There would be no benefit to the end user to move to a yearly release cycle. You currently have the option keep the same version for 3 years, 1,5 years, 1 year or 6 months--and anything in between--with full support for security and bug fixes. Your proposal would only remove one option.