Does Grappling in D&D 5 have any rules other than preventing movement?
I seem to remember in previous versions of D&D, Grappling would grant bonuses to attackers and make grappling creatures harder to attack and such things.
However, I'm reading the rules for grappling in the D&D 5 Basic Rules, and I'm not seeing anything like that. It appears that grappling simply prevents movement, and not much else.
From the conditions appendix:
A grappled creature's speed becomes 0, and it can't benefit from any bonus to its speed.
(etc., how to end the condition)
Is that all grappling does? It doesn't hamper attacking or anything else? Or am I missing something?
If that's all, in what situations would I really want to grapple someone?
You are correct, however there is one extra benefit you gain from having someone grappled and that is to forcefully move someone. You mainly want to grapple someone when their movement is giving you problems or you want them to be elsewhere, and shoving them is not good enough.
In addition to normal grappling, there is a feat in the player's handbook called Grappler, which allows you to restrain your target at the cost of retraining yourself as well.
Since the original answer, a WotC forums user posted *The Grappler's Manual*. It's a very detailed analysis of the pros and cons of grappling. http://community.wizards.com/comment/51292961
Note: The link in @sadaqah's comment above no longer works. The Wayback Machine has an archived copy of the page at http://web.archive.org/web/20151028040341/http://community.wizards.com/comment/51292961
So, one big general clause, if you are a melee damage dealer that isnt fragile, you want to grapple anything that can move away from you and hurt you. This is wizards, rogues, rangers, clerics, people with longer reach.... all of these things. Why? you can continue to attack while grappling. so pin them down and punch them. If they had a reach weapon, they cant use it. If they have a bow and no point blank shot, they get disadvantage.
and moved again: http://www.enworld.org/forum/showthread.php?468737-The-Grappler-s-Manual-(2-0)-Grappling-in-5th-Edition