If you want to criticize the Komarov or Cizikas deals, go ahead. Re Komarov, I didn't like the term there - especially when Lou was bidding against himself. On Cizikas, I like it well enough as he had to extend the deal to compete with other teams who would clearly have given Casey more dollars up front - something the Islanders couldn't do.
But for Martin and Johnston, there's literally no downside. I recognize that you are taking issue with the term - not the money - but the two go hand in hand. If, in year 3 of these deals, either player shows that he can't skate anymore, the Islanders simply waive them and bury them in Bridgeport and there is no salary cap hit at all (maybe $100k - but by then, probably not). So while its non-conventional to give these type of deals to 4th liners, the Islanders a) place a disproportionate emphasis on their 4th line than other teams (its worked pretty well recently though) b) have a lot of guys who would like to stick around if it could be made convenient; and c) have ownership who apparently have no problem dishing out retirement presents that will hit after a player's usefulness ends.
The Islanders obviously like Ross Johnston and want him to stick around. They felt that way when they gave him the first deal and didn't think Martin would be here at this point. They still feel that way, apparently. Given the chance to lock him up for 4 more years with no cap implications, why not? I don't think anyone is saying what a great move this is by Lou - Johnston is an intimidator first and foremost. Locking a guy like that up is hardly on the top of his resume for GM of the year. Rather, I think most people are pointing out that this move has no real downside.
Again - if you want to criticize Uncle Leo's deal, have at it. I'm right there with you. Cizikas's deal could have cap implications as well (likely will). This on - and Martin's - simply do not.