Like any application of a submission hold, saying it is easier than done. Executing moves such as getting someone's back from half guard would be extremely simple if I didn't have a 195lbs shirtless sweaty man named Frank atop of me holding my face down [and sweating one me]. The way I see the guard is merely a game of russian roulette. There are really no benefits nor negatives about it, it is merely a spot of stalemate for both competitors. Yes, when in guard you are able to apply your legs for moves such as armbars, triangles, and my personal favorite, gogoplatas. But seeing how your legs are so tightly wound around your opponent, the second you loosen your grip and move your legs/hands, they will do all they can to exploit your position and put you in danger mode if you are not fast enough or apply enough pressure to secure them. If you've faced some skilled BJJ masters, you know they clinch to you like a leech. You can easily tell a shift in their weight just by a loosening of a limb. It clicks in your mind "oh snap, he's making a move". bjj is a game of chess, you need to jedi mind trick your opponent into thinking they are doing something right, when they are merely leaving an opening for a strike. Tactics, in my opinion, you can obtain only through experience and training.