Another thing i don't like is that blurred vision everytime there is sun. That irritates me
Well this is okay, you should be affected by the sun.
I'd prefer something like this:
Stage one - 30% fire weakness, 20% frost resistance, -25% regen rates and -20 to all stats in sun, no sun damage, vampiric drain 5 dps, 5% damage reduction from physical attacks, 5% speed increase and jump height.
Stage two - 60% fire weakness, 40% frost resistance, -50% regen rates and -30 to all stats in sun, 1 sun damage per second, vampiric drain 10 dps, 10% damage reduction from physical attacks, 10% speed increase and jump height.
Stage three - 90% fire weakness, 60% frost resistance, -75% regen rates and -40 to all stats in sun, 2 sun damage per second, vampiric drain 15 dps , 15% damage reduction from physical attacks, 15% speed increase and jump height
Stage four - 120% fire weakness, 80% frost resistance, -100% regen rates and -50 to all stats in sun, 3 sun damage per second, vampiric drain 20 dps, 20% damage reduction from physical attacks, 20% speed increase and jump height.
You could add other little things like when wearing a hood, you take 1/4 sun damage for example. Maybe unarmed bonus and claws instead of fists.