D'karr
Adventurer
What I've seen are assertations that, if positioning is important, and if it is difficult to pinpoint positioning without a grid, the degree to which positioning is important is going to have a direct affect on how difficult it is to play without a grid.
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And, if you disagree that that it is harder to play without using a grid when a game uses a great number of effects that rely on precise positioning, while using a large number of pieces whose precise position must be known to adjudicate those effects, than it is to do so with a system that does not rely on precise postioning, or that rarely does so, then I honestly don't think that anyone or anything is likely to change your opinion.
So what you are saying is that if PRECISE positioning is important then the game is much harder, and what several people on this thread have said is the if you have decided to go gridless you are foregoing precise positioning. PRECISION and GRIDLESS are mutually exclusive to a certain point.
IF I decide that I'm going to go gridless in 1e, then the precision of where the rogue is to do his backstab is entirely in the hands of the DM or it can be handled by "social contract." You have given away the need for precise positioning for the convenience or novelty of going gridless.
IF I decide that I'm going to go gridless in 4e, then the precision of when the rogue has combat advantage is entirely in the hands of the DM or it can be handled by "social contract." Once again you have decided that the need for precision is not important to your game.
By making the decision to go gridless you are by default consciously sacrificing your NEED for exact precision. However, you don't have to lose "perceived" precision. I can still push, pull, slide, etc. in a gridless environment. It just requires that I not be a slave to precision. Somebody upthread mentioned not to get "nitpicky about precision" and I'm paraphrasing.