I usually role-play so I like to max out the perk tree to show my character is a master of that skill so I probably will get the perks for role-play but I'd rather get them later so that I don't feel like I've gimped my character because I'm playing on Master and need helpful perks first.
I just wanted to know what perks in the One-handed and Block tree aren't as great, either useless or bugged. If there are any other perks in other skill trees that have problems you can mention those too as I will likely make other characters. Thanks.
Bladesman is weak because it is based on the base damage of the weapon. It is a very small damage increase considering you can spend three perks on it. If you are short on perks there are definately better places to spend them. Your mileage may vary with Bonebreaker or Hack and Slash, but if you are looking for an underpowered perk in I'd say Bladesman is it.
Shield charge has a bug where it stops working after a while. If you are on PC, I think there is a way to get it working again. If you are on console it might be best to avoid this perk until they get it fixed. That is the only bugged block perk I know about and all of the block perks are pretty good, although even unperked block is useful because of the stagger you get with a bash.
Deflect arrows had a bug that made it overpowered but I the latest patch is supposed to fix this.
Other perk bugs include Tower of Strength in heavy armor that does nothing.
Elemental Potency makes summoning staves stop working.
Atronach (from either perk or stone) will absorb your summoning spells.
There may be other bugged perks that I cannot remember off the top of my head. Safest thing to do if you are undecided about a perk is to check the UESP site before taking the perk.
http://www.uesp.net/wiki/Skyrim:Skillsp