I think you should add something about flat grassy terrain; in my free time or when waiting for refill around corns like holiday resort I usually clear out a relatively decent area of the fern stuff in the grass blocks. It really annoys me when I try to flint and steel, especially vsing teams.
Invisible fires can also work really well to your advantage on them if you aren't derpy enough to run into them. Think that should be included as well.
Overall, I'd say it's right, but I'd have to disagree on the terrain part. Having height on an opponent IS indeed a pvp strategy that can help you outmaneuver someone completely; jumping on them, hitting them twice and knocking them down 5 blocks or more can definitely change the game, leaving their teammate ready to 1vs1. After that you can simply repeat what you did previously and the person who has already been knocked off the first time will usually come back. If you do do enough damage you can definitely kill them or fit one snipe in easily (depending on their gear and the amount of hits you get off). Dealing with people on vines is completely different - I don't know if you meant 'vines' when you wrote hilly train, but being on top of vines is definitely a disadvantage. What you said there about them being able to hit you but not working vice-versa is correct.
If you have a clear lead on the opponent (10 blocks or so) you can easily hold shift and just run up the hill. Those with good running skills can also just jump up if the oppondent is 5 blocks behind them if they don't clip anything. It's very good for taking on teams and killing people with better gear.
On the issue of block hitting, Billa would be right again. Block hitting simply negates the ability to move around and get the first hit in. With 1.7, getting the first hit on someone who's not moving is practically a guaranteed kill. The only time I block hit is when I'm in an extremely confined space in which you can't strafe in. Hitting people who have their sprint binded is very hard when you yourself are constantly getting battered over and over again. In a 1vs1, someone with the 1.7 BSM would easily overcome a person block hitting except in tight/confined spaces. From there on it's a battle of bow spam, fishing rods, flint and steel, block hitting and armour. Utilities are the only thing that'll save you in such a scenario if a person outgears you, unless someone is terrible or is lagging severely and can't hit you.
I only block in water when I'm really sure I'm going to dodge it but am slightly worried it may hit anyway - if I'm probably not going to get hit but I do instead blocking is only going to aid me. I guess there isn't much more to it than using it in water when spammed with arrows you can't dodge or probably will dodge and when you want to 'team' or 'truce'.
Also Jake, incorporate some knock back tactics in there, things with the bow and fishing rod. I generally follow up going in with a sword after I land two bow shots as I immediately have the upper hand in:
A - Hearts
B - The fact that they can't hit me at this current time whereas I CAN hit them
C - Intimidation; people with better gear are likely to run away (if they do manage to get away), but if you refer to point B, if you hit them into something behind them, hit them down onto lower terrain or they simply come back for more, they'll genuinely try to run. This last point is only helpful if you're good with the bow.
Take note, most things I have mentioned aren't guaranteed a kill with someone in full iron, but it will certainly get them low and has (a 80/20 chance for me) of killing them if I wear them down earlier (with the bow, fns or rod) or if I simply get a lot of shots off.
