Twin linked shots at BS 2 hit ~55%, so its slightly better than a BS of a 3. Thats nothing to be afraid of.
Most Ork shooting comes in such large numbers that even only 1/3 hitting will still cause some damage. Lets say you have a shoota squad of 30 orks. 25 of them are in range of the guns, and you have 3 big shootas in rage. Thats 50 dice of normal shots and 9 shots of big shoota dice, for 59 dice total. You will still score 20 hits with that squad, which is quite a few hits!
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