My advice is to always run as big of motor as you can. If I could easily add a thrid battery I would and but a 36V 100lb on it.
Much of the this has to do with what you fish for, and where.
If you primarily are a caster like me for Muskie, it is difficult to have one hand free for a remote. I have only had my terrova/link for this year so I haven't really used the entire system yet, however I have not even used the remote yet.
I fish LOTW 5+ weeks a year so I don't want to be worried about the battery going dead on my remote so I have mounted my bow unit on a long ram. This brings it closer for my weaker eyes and also close that I can perform all the function of the remote throught my unit. I personally will probably never use the remote.
The main reason I purchased this system is for the follow the contour option and establishing and returning to routes. I should point out that (as far as I know) the follow the contour option only works on lakes that are mapped in HD. Even on the latest Version 5 lakemaster chip many of the lakes I fish are not in HD so the follow the contour only works on a limited number of lake. I would expect this will change in the future.
I haven't learned how to use the follow the route option yet but that should be nice.
So long story short and answering the original question, yes get the remote.
Have a good day.