Wizou, I have tried this tool and I like it a lot.
I run a mod and server and honestly, I love this type of program. Personally I think there is a major difference between this and Datastorm, and that it's important to realize that if you're going to criticize his hard work because it lets people "cheat".
For my mod, I do block Datastorm, because I believe that to be a cheat. This is because that program specifically shows things that I do not want players to find. This is particularly wrecks and secret areas. The rest doesn't bother me at all, and I think it's a great tool as well, but the showing of wrecks and secret areas can spoil the fun for people or allow people to cheat and get things they shouldn't be able to get.
However, this tool only shows trade routes and bases, which is fine in my book. Personally, I agree with those who say that this program will actually improve trading in the game as it will show modders if they've accidentally made a run "too good", which can easily unbalance things. So what if players know the better routes? First, if a modder does their job and puts together a quality mod, then there shouldn't be uber trade runs to begin with, and second, most of the challenge and fun in trading is making the actual run. Especially in mods like mine where the NPCs are smarter and faster, the trading can get pretty darn fun.
Anyways, Wizou, just remember that it's your program, and you don't have to change it for anyone. Do what you want with it, and I'm sure it will turn out to be great.
I already have plans to use it to balance the trade routes in the next version of my mod.