Let's be honest, the ONLY reason Elvis lost to Bisping was related to exhaustion. He was dogtired.
Had he not been so tired, the win would have easily been his in that second round.
Would he have saved himself some pain and some energy if he had utilized rubber guard principles in the first round, rather than the old (and failed) BJJ method of closed guard defense? I think the answer is clearly yes.
Now, having established this, you really have to wonder how many other fights would have had a different outcome had the rubber guard been used. Think about it.