Good, I always looking to play campaigns, or to replay old campaigns if you they are revamped.
It is not needed to use every single tool available, unless you want to do it or it fits your story. If with the vanilla stuff your campaign it's good enough, then it won't made any difference using the new launcher/tools or just the old ones, but if you want to add the intel, new colors and so on then yes, it requires to work for a while just to "modern" everything.
For example, those campaigns I mentioned early, like the "Emperor return", "Ixian campaign"... had some modifications of the units, so I took the advantage of the new launcher and created the folder necesaries so now anybody can play them any time withouth doing a copy of the files, back ups and so on; the campaigns itself are not touched (except for 1-2 extra lines needed to make those missions to load those custom files), but the campaign plays the same with no further alteration for the player.
On the Frank Herbert, since it is based on the book I used the "intel" to give a brief backstory about the characters mentioned, just to help a bit with people that didn't read the book or saw the movie (although it was never a requirement to start with) but that's it, my other 60-70% of works hasn't been altered even with the new stuff available.
So don't worry about that. It is possible for you to redo the Ordos campaign if you feel that you can make it more fun and balanced and complete the Atreides the way you have it done is also fine. Intel, terrain-map... it's more like a "luxury". Fey used to write on the briefing the information of the units, pros and cons and so on, but now that info it's in the intel.
The good thing it's that if you always wanted to have certain unit available for 1 specific mission now you can do it; like giving to the Atreides a Devastator to be built, but as you cannot do that (unless you capture the hark heavy fact) and use spawns, reinforcements or something like that, you can actually make the devastator to be produced for the Atreides but only for that 1 specific mission, while the rest keep the vanilla stuff. This is more like in "ooh, that limitation it's gone, now I can do that idea that I couldn't before because either atreides never build the deva, or they will always can".
Anyway, if you check the Feda's campaign and the Custom Campaign data you will see multiple folders and so on, and my lastest campaign I went overboard and I did around 10 folders, so I could load 10 different modifications. So maybe 1 or 2 missions could be altered with the new tools to allow you to fit your story much better withouth "cheating" with spawns and so on, but it is not really a must have.