How about introducing user rating system on pending or graveyard maps?
Loved points : The number of raters * (Average of User Rating - 8) * ( 1 + StarPriority*0.05)
Required points for Loved : 350 + 10 * The number of difficulties
WIP maps should be excepted. User rating should be reset when a pending or graveyard map changes to WIP map.
Result
Both many raters and high ratings will be required.
A map under 8 User Rating won't be loved map.
Graveyard maps can also be loved maps.
the advantage of star priority is kept.
Loved points : The number of raters * (Average of User Rating - 8) * ( 1 + StarPriority*0.05)
Required points for Loved : 350 + 10 * The number of difficulties
WIP maps should be excepted. User rating should be reset when a pending or graveyard map changes to WIP map.
Result
Both many raters and high ratings will be required.
A map under 8 User Rating won't be loved map.
Graveyard maps can also be loved maps.
the advantage of star priority is kept.