If you were not aware, any tool or effect named "Legacy" or "Obsolete" will probably be removed at some point in the future. In fact, that is why developers rename these tools. It's a warning. When this warning happens, you should begin to engage in new workflows, even though the newer tools may not have every single feature the previous tool did.
If you simply cannot move off the Legacy Titler, and do not want it removed, or find it has a feature you simply can't work without, you can let the team know. To do so, upvote this feature request.