Sure they do roadmaps, the trick is finding them! Here is one for 365:
http://fasttrack.microsoft.com/roadmap
Here are links to a couple of independent sites tracking MS announced roadmaps
https://rcpmag.com/articles/list/microsoft-office.aspx
https://www.directionsonmicrosoft.com/roadmap/secured/table-of-contents/2016-07 (a subscription service)
http://www.wictorwilen.se/what-s-new-on-the-office-roadmap-2016-03-03
Although they haven't said it in so many words, the obvious plan is to kill the one-time payment licenses, not enough profit in them compared to pay-forever rentals. Part of that plan is the switch from per-machine licensing to per user and the associated
change to demand the email account at the very START of 2016/365 install. This makes preloading 2016 on corporate machines effectively impossible, or at least very awkward (requiring dummy email accounts
MS have said that the feature set in the one-time payment license is fixed at what was in it when 2016 was released last year. There will be security updates, but no new features. Again, without saying it, they have finally conceded that grammar checking
is NOT a "new" feature so they will be the benevolent leaders and grant what 'the users have requested' ...
Unfortunately, although I strongly prefer the one-time payment license and Pro Plus MSI install, I think you pretty much have to recommend 365 for a few reasons:
- college students should be able to get 365 University, a discounted bundle
- unlike in 2013, in 2016 MS has been delivering a reasonably steady flow of new features
- your students should have the opportunity to learn these new features as they come out
- there are enough extra "shiny bits" / extra features in the 365 bundle to make it worth it for students
- they are mobile between home and school so the extra OneDrive space and configuration portability is definitely to their advantage
- 365 allows them to install on 2 computers + 2 tablets + 2 smartphones, 2016 only 1 computer (college/university students are more likely to have multiple devices they want to work with, frankly I don't understand why MS chose to limit students to 2 devices
and all other 365 licenses to 5).
But, if you want to stick with a constant, lowest common denominator feature set, then yes 2016 could be your recommendation.
This is the MS monthly updated blog listing the new features added to 365:
https://support.office.com/en-us/article/What-s-New-and-Improved-in-Office-2016-for-Office-365-95c8d81d-08ba-42c1-914f-bca4603e1426?ui=en-US&rs=en-US&ad=US
Does your school have the 365 Education bundle, which is free for the students? Are you aware of the teacher resources that are available with that bundle?