The best replacement for custom rom is xposed.

The best alternatives to custom rom are rated as following:
★★★★★  xposed
★★★★  launcher
★★★★  rooting
★★★  custom kernel
★★★  stock rom
★★★  stock rom android
★  stock nexus 4

Your alternative for custom rom is not listed? Suggest!
Speaking about custom rom, one probably shouldn't forget about rooting.

Other search terms related to custom rom and their ratings are:
★★★★★ rooting
★★★★ root
You have in mind a companion for custom rom and it is not yet here? Propose!



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custom rom
xposed
launcher