Since there isn't a house rules forum for 5e, I figured this is the only place I can post this; and yes, I'm aware of why there isn't a house rules forum, but that doesn't invalidate posting a house rule. At least not IMO 
I've always liked the idea of weapon speed. I've always felt that this was a factor that was overlooked to the detriment of the system. I'm hoping that it makes an appearance as a modular rules addition in 5e. It's in this spirit that I post this as an idea to toss around as a future prospect.
We know that there aren't going to be minor actions in 5e but that there will be an action segment and a move segment and that you can only attack in the action segment. This actually lends itself to a speed system quite well if you assume that changing a weapon or implement is a movement. This would mean that your initiative would change for your next turn but not within your turn.
So a fighter with a longsword which has a speed of 5, say, rolls and adds his modifiers for an 18 initiative, minus 5 for his sword for a final result of 13. He attacks and then decides to change to a dagger because it's faster and he's hoping to get in an attack before his enemy does next turn. So he drops his longsword and draws his dagger (speed 1), changing his initiative to 17 for his NEXT turn. His opponent was acting on a 16, so when the next round of initiative starts, the fighter gets in an attack before his enemy does, killing him.
This could be extended to implements as well by simply giving implements a few weapon-like modifying conditions like using no implement is quick but adds no other benefit whilst wands could be fast but grant a 19-20 crit range, and staves are slow but grant brutal 1 to all damage dice of a spell being cast.

I've always liked the idea of weapon speed. I've always felt that this was a factor that was overlooked to the detriment of the system. I'm hoping that it makes an appearance as a modular rules addition in 5e. It's in this spirit that I post this as an idea to toss around as a future prospect.
We know that there aren't going to be minor actions in 5e but that there will be an action segment and a move segment and that you can only attack in the action segment. This actually lends itself to a speed system quite well if you assume that changing a weapon or implement is a movement. This would mean that your initiative would change for your next turn but not within your turn.
So a fighter with a longsword which has a speed of 5, say, rolls and adds his modifiers for an 18 initiative, minus 5 for his sword for a final result of 13. He attacks and then decides to change to a dagger because it's faster and he's hoping to get in an attack before his enemy does next turn. So he drops his longsword and draws his dagger (speed 1), changing his initiative to 17 for his NEXT turn. His opponent was acting on a 16, so when the next round of initiative starts, the fighter gets in an attack before his enemy does, killing him.
This could be extended to implements as well by simply giving implements a few weapon-like modifying conditions like using no implement is quick but adds no other benefit whilst wands could be fast but grant a 19-20 crit range, and staves are slow but grant brutal 1 to all damage dice of a spell being cast.
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