Basic service is good for RPS, weather info and giving rescue services a ballpark area of where they can find the wreckage and (up here in Scotland) the football scores if available.
Traffic services is as it sounds, if they have the time and equipment to cover your location to let you know about traffic they may do that but again are not under any obligation. And Deconfliction is basically if they see conflicting traffic they'll suggest a vector to hopefully avoid a mid air but again it's up to you as PIC not to hit anybody.
I could be wrong but that's my understanding.
Pretty much, to me a deconfliction service is over the top unless actually in IMC, otherwise they are giving you headings all over the place rather than just telling you about traffic you can probably spot and avoid if they tell you about it via a traffic service.