There's one aspect of LifeTime Premium which is sub-optimal, both from a user and company standpoint: Once you buy it, you're locked out of Premium Plus unless you manage to get one of the rare upgrade slots when they're available. This means there's no way to try out any of the cool P+ features as they're announced unless you have an alt to upgrade.
With new P+ homes and account features coming out, it would be great for LifeTime Premium users to have an option for a paid temporary upgrade. The perfect compromise is a discounted P+ price for LifeTime Premium users. LL is able to get both the LifeTime price and a renewing monthly/yearly fee, and users are able to access features they're currently locked out of.
Since this issue affects a very limited pool of users, it would make sense to have the option available by ticket only and mentioned on the LifeTime Premium FAQs - no need to clutter up the main Premium site with it.