They have started testing Update 20 on Bullroarer. If you're interested in seeing what's coming or just want to try some things you can't afford on the real servers, you can download the Bullroarer client and check it out.
The Bullroarer server will be up from time to time as they test out the new content and other changes. To access it, you must download and install a separate LOTRO client. You can switch back and forth between the Bullroarer client and the regular client, but an account can be logged on to only one server at a time (either Bullroarer or one of the real servers). You can copy one or more characters to Bullroarer using the transfer feature. What you do on Bullroarer does not affect the real servers, and there's no way to get anything back from it. On Bullroarer you can get lots of gold, TP and MC to spend, as well as other tokens and barter currency. There are ways to instantly level-up new characters.
The Bullroarer forum https://www.lotro.com/forums/forumdisplay.php?787-Bullroarer-(Public-Test-Server) has a lot of information, although it's not always easy to find.
The download links are here: https://www.lotro.com/forums/showthread.php?571061-Bullroarer-client-Installer-DOWNLOAD-LINKS Note that if you have installed it before, you should not need to download it all again. If you start the Bullroarer client, it should update to the current beta version just like the normal client does.
Here are some details:https://www.lotro.com/forums/showthread.php?651783-Bullroarer-Update-20-Preview-and-Release-Notes
There are new areas with new quests.
They are raising the price of Small Reputation Acceleration Tomes from 6 medallions+60 marks to 40 medallions+400 marks. If you use them a lot, you may want to stock up. (I think they stack to 100.) Not sure, but I think the change is motivated by new level-cap rep crafting.
They are raising the max tiers and final tiers on imbued LIs. For the main legacy, the final tier is increased from 43 to 53. They give you 5 tiers automatically, so you can add up to 5 star-lit crystals to reach the new final tier. For other legacies, the final tier is increased from 59 to 69. They give you 5 tiers automatically, so you can add up to 5 empowerment scrolls for each legacy to reach the new final tier.
They did wipe Bullroarer before opening it, so you need to copy any characters you want to use.
As always with Bullroarer, things may change before it goes live.