What is the enhancement in mind? How should it look and feel?
Although many of the functions in Lylock still work, one thing that doesn't is the Banish timer, as it relied on the timer from Deadly Boss Mods core module - and that's no longer being developed. In turn, it appears that Lylock is no longer being maintained...
    Please provide any additional information below.
My first Warlock addon was Necrosis, and I'm now raiding Naxx 25 and still using it. Some time ago, I found Lylock, which had many features that duplicated those of Necrosis, but also some great features that were more or less missing from it.

For example, Lylock will warn you, when you are in a party/raid, that a soulstone  hasn't been used. It will also do this when you are not in a group if desired.

It will also warn you (and your party members) what banish you have on what target, and also count down from 15 seconds when it should be reapplied or run out; it will warn when banish breaks early/on time or if you've died while something is banished. (It looks as though it does this by looking at all party targets, however, so if you have five warlocks all banishing targets, it will report on each one - not ideal).

It has an auto-HS trader for when you are in a raid/party.

It reminds you with a screen message when no armour is applied

With the demise of Lylock support, having these functions incorporated into Necrosis would make it (imho) the full package :)