I agree principally that series mods are not necessary anymore, in the same way as @skyweiss BUT I'll mention that the system by which page formatting works may need to change, series mods don't necessarily need to have the power to add games freely which could be re-assigned to super/regular mods because I had to submit three support hub requests to make tiny changes to the background image and icon of this series https://www.speedrun.com/drizzlepath_series of which I am the sole moderator of all included games, which is absurd. If it were feasible I'd ask that Super Mods be given the power to add games freely on series whilst regular series moderators have the power to change the series page but nothing else and people can be added as regular series moderators via support hub requests if that's an important component of the page (if it's a big series). Although I know that'll likely never be implemented or changed because of the way the series pages behave like a normal game's page.
The only reason series mods aren't a thing anymore is because mod farmers use that opportunity to add stupid/short games that wouldn't have been added if they put a request through the support hub.
Series Mods work really well for some things and are not at all necessary for others, ROBLOX series absolutely requires series mods to filter through games from the site that shouldn't be on the site, since it's all UGC there's a lot that doesn't belong. Sometimes site staff adds games on our behalf (which i still don't quite understand) but overall the system that's been going on has worked for us in the last few years very well. However, there aren't too many other series that i could see benefiting from this system, just because Roblox is unique as to its game requests. Idk i'm tired and just saying words this probably doesnt make sense in the slightest but it's just my thoughts
i agree with RaggedDan that it is absurd needing requests like that for small changes when you create a new series what realy is generaly the problem with some mods being able to make those changes in their series? because it seems like adding new games freely is the only thing that can lead in problems i think every series should just get the requester as a regular mod in it, who would have permission to do small modifications, while only super mods would have the chance to add new games (super mods have to be requested by the hub)