One of my players has a Wild Caller Unchained Summoner with an agathion type eidolon. During one of our encounters (at level 5), I pointed out that life link helps the eidolon stay alive at the expense of summoner hit points, not the other way around, which changed how he was playing his summoner/eidolon duo during encounters quite a bit.
After the session finished, he commented that there wasn't much point even having his eidolon out when he could just summon d3 (or soon d3+1) augmented earth elementals etc with a much better attack routine. I pointed out that the eidolon is potentially more survivable, but he correctly responded that survivability doesn't matter when he can just use another of his 3+CHA uses and even place the new set of summons in a new position as needed.
This is somewhat disheartening since his eidolon is an interesting character to have around, and I believe he would rather have it out as well.
Has anyone with an unchained summoner found this situation to change later on not have an issue with this at all?