So I have started playing Dawnguard, decided to join The Dawnguard, and have done a few quest in the storyline. Before I started playing I decided that I wanted to make a Dark-elf, using the crossbow, and when it gets to melee combat I change to my dawnguard axe in one hand and flames (destruction) in the other hand. I also sneak and assassinate with my crossbow sometimes. Why? Beacuse before I have made about 5 different characters, all of them using only one thing (only bow/ only sword and shield/ only two-handed) but it was really boring beacuse I was just redoing alot of quest. After that I decided to take a few months break and wait untill Dawnguard came, and now im back playing skyrim ! So now I decided to have 3 different weapons (im also using restoration) so I just won't make a new character all the time. Now when im level 13 and have played for abit I fond it kinda nice to both have Sword and destruction, but I see that Bethsda didn't really put so much effort in it. It's sometimes really bad, if I attack with my sword while casting fire, I can't move while doing the attack. So now im wondering if I maybe should use the consol to remove all perks from destruction and put them into block. Block makes the fighting sooooooo much more awesome. It would fit so much better to my character (both in combat and to "the dawnguard-story"). I figured that I would in any case make atleast one new charcter, to join the vampires. As a vampire I would probably just use magic, so it feels kinda weird to use destruction on my dawnguard character. I really want to start using block on my dawnguard-character, but i fear that I might just get trapped in the evil circle of just doing new characters and redo all the quest and ruin the game again! If I do use consol and remove my destruction perks and change them for block Iprobably also change race to Imperial.

How do you guys think I should do? Should I keep my destruction in one hand or change to block? Thanks.
And sorry for my not so awesome english!