It's never a mistake to go slow. In fact, is it extremely unwise to inundate beginners with heaps of technical information and pointless exercises intended to polish the skills of professional dancers. That's the surest way to scare away a student who may otherwise have someday become that polished professional had there been some enjoyment and entertainment value along the way, especially in the beginning.
In the end it all comes down to balance. On the one hand, in my independent studio I've seen teacher after teacher shoot himself in the foot by demanding too much too early, and losing the student to frustration or boredom. On the other hand, I coach the staff of a chain school whose motto is "fast, fun and easy", and take that concept to the extreme. My main emphasis with them is to be *more* technical, because their ability to hold on to students beyond the bronze level is abysmal.
Weight connection is extremely important for effective leading and following in open position, and can't be avoided for too long. A certain set of very basic patterns can be done without it -- more, I suppose, if you're dancing a pre-determined routine. But I wouldn't wait too long before introducing a few very simple exercises, such as stationary push & pull changes, and basic walks forward or back while maintaining either push or pull. These are simple enough so as not to be too intimidating or frustrating, so long as you introduce it in small doses and allow the technique to make its own way into actual application through permeation only. I'd save the weight connection stuff in actual dancing for a little later. It's amazing how much technique built up through basic exercises will end up in one's dancing without ever having practiced the application. Often (though not always), the exercise is enough.
Regards,
Jonathan Atkinson