As it would take me awhile to look in forums for which ones are already in the roadmap, I'll just post the ones i haven't seen in requests or the roadmap yet... and a reason for why to add to the core
ircd_init - Most people love the bots in the services channel and then you dont have to /os set logchan on
ircd_vhostserv - Easier for newcomers to get a vhost
cs_sync - obvious... update all channel modes without doing them all by hand
cs_statusupdate - obvious again... i hate giving modes after adding or saying hey /hop or hey ! /ns update
cs_akick_founder - That is a must if not already in effect. Even if they are only playing no one should be able to do that.
cs_autovoice - Just a nifty one i think
cs_migrate - Don't want this as much but meh if you feel like coding!
ns_noticeunregister - I don't know how much i want this one but i use it :\
ns_joinhelpchan - Obvious...
ns_sagroup - meh i use this one too...
ms_chanowner - If any new rules are set then easiest way to let all channel owners know
m_connect_flood - Obvious...
os_amode - any number of reasons for this.
os_forceid - Helps in some cases
os_modreload - Very needed
os_tssync - Helps syncs all servers
os_notinchanlist - Pretty helpful when looking for botnets
bs_uptime - again its helpful!!
bs_seen - Nifty as hell
bs_autoassign - also nifty as hell
If any of these are already in the roadmap sorry i apologize, but i dont think i saw any of them thank you and have a good day!