I believe that the mining reward should be increased. Idena's rate is very low. Mining income is unreasonably low and there is no incentive to continue it. Many people only go through validation without using mining.
I'm one of these, I seldom mine I hardly get 6 IDENA daily in mining it's good if Idena is at least worth $1 so I prefer the validation where I have a good chance to get more rewards by passing the validation, but this is the only coin worth mining using a PC without the expensive graphics, it's not hard on your computer too.