So, I have tested the effect of FL and HR on a few songs. These are the things I could assess.
Note: This may only apply to players who can play FL about as well as Nomod.
1. On easy songs (where you can hold a high combo easily and at worst only miss a few times), HR gives a big advantage. As long as one can hold a high combo, it will most likely result in a better HR score than FL.
2. In cases where HR makes you hold a high combo a lot harder, FL might result in a better score.
This one may apply to songs with a higher amount of long notes. LNs on HR are a LOT harder since the release timing becomes very narrow, making it harder to not miss. This shouldn't be a huge problem for players who can play LN very well.
3. On harder songs where you miss constantly, both mods could result in a better score.
This is something that might become more interesting during the finals. A good FL player could very well beat a HR player in that difficulty range.
All in all, this could be interesting, depending on what type of patterns appear in the map pools. The changes of the LN system brought in Score V2 could result in more strategic song/player choices, especially in the later stages.
My recommendation would be to look into more LN heavy maps to include in the map pool, if there won't be any more changes.
Note: This may only apply to players who can play FL about as well as Nomod.
1. On easy songs (where you can hold a high combo easily and at worst only miss a few times), HR gives a big advantage. As long as one can hold a high combo, it will most likely result in a better HR score than FL.
2. In cases where HR makes you hold a high combo a lot harder, FL might result in a better score.
This one may apply to songs with a higher amount of long notes. LNs on HR are a LOT harder since the release timing becomes very narrow, making it harder to not miss. This shouldn't be a huge problem for players who can play LN very well.
3. On harder songs where you miss constantly, both mods could result in a better score.
This is something that might become more interesting during the finals. A good FL player could very well beat a HR player in that difficulty range.
All in all, this could be interesting, depending on what type of patterns appear in the map pools. The changes of the LN system brought in Score V2 could result in more strategic song/player choices, especially in the later stages.
My recommendation would be to look into more LN heavy maps to include in the map pool, if there won't be any more changes.