I have been using vector packages since the late eighties, moving from one to another over several different operating systems without problem - except for Illustrator, blank wall, vertical learning curve - a weird scary alien thing. I suspect if you are a Photoshop user it is a lot easier and it is a very capable professional package, quite possibly the standard professional package.
What we really need is something relatively cheap, simple and easy to use. The list price of Serif's DrawPlus is not far off £80 which puts it at the upper end for this though there are usually offers and older versions to be found.
I have DrawPlus and CC3 but I have not drawn any deckplans in years. This new edition of Traveller looks like the stimulus I need to get me back in the saddle, I just need to finish Halo first...