We bought the same model after 13 years with our popup. We love it. Our favorite spots are lake front state parks with no hookups. The sites are spaced out nicely, but the many of the nicest ones are hard to get into. This trailer can get in there no problem. And, it still has a lot of features and living space.
Our first big trip after we bought it was 2700 miles in 12 nights, with 8 one-night stops. The front bunk comes down when still hitched, so we could be setup in about 10 minutes on a pull through site. Worked out nicely, the kids can hit the pool or whatever after traveling, while the parents can have a cocktail and get dinner ready.
If you don't mind the tent ends, this trailer is really versatile. Small enough to tow through just about anywhere, big enough to be livable for long trips.
As for upgrades or mods, we have been slowly adding things. First purchase was a portable grey water tank. With the nice kitchen, we found we were filling the grey tank pretty quickly. We never used to camp before Memorial Day or after Labor Day with the popup. Now, the early/late season trips have become our favorite part of camping. Added popup gizmos/reflectix for the colder trips to help with condensation. Also going to change the thermostat to a digital one. The stock one was a huge temperature range, which is getting annoying. Plus, there is no heat duct to the front, so I'm considering adding a small electric fireplace in the cabinet under the TV. Could just use a portable heater, but the fireplace would cool if we can pull it off.
And added LED awning light strip - but your 2015 should come with that. Added 200 watts of solar and an inverter for the times we don't have electric. We camped quite a bit before deciding what we needed to add. Otherwise, its mostly just been a process of figuring out what gear we need and how best to store it, and figuring out what we don't need and getting rid of it. Still perfecting that, but the whole pack up and un-pack process is so much easier than with a popup. And, you can keep a lot more things ready to go with a tt.
2005 F-150 FX4
2013 Rockwood Roo 23 IKSS