Vanilla max beacon range is 50 blocks, which is around a 3x3 chunk area, not even large enough to cover slime fun/tree farms in most cases. This can, of course, be compensated for by adding more and more beacons however, due to the beams, many people have constant frame drops whenever entering large beacon-filled cities like Celle and Konigsberg, oftentimes even crashing people when they load in at a certain spot.
This is a major problem for towns that focus on recruitment/building specifically as you cannot give your members buffs without causing frame drops making it a chore just to move around your town.
As a fix for this problem, I recommend changing the beacon effect range to around 200-300 blocks, 4-6X the original range, most people who use these (such as myself) already have enough to cover their towns in beacons and only hold back due to the lag they cause, so it's not like this would be horribly unbalanced, if anything it'd make beacons (which make grinding easier along with other QOL improvements) much more widely used.
I have found a few outdated plugins that add exactly this feature but uh they haven't been updated in 3 years so lol.