You could argue the same lame point about every other time people complained about class changes (how about that cast time for bards? amirite?) . The root of the summoner's problem is that it's tied weirdly to arcanist rather than being it's own class. It's always been an oddball and isn't a really great design. The heal thing is a side effect of that and taking away sustain was a mistake. If the class was better designed we wouldn't have a raise or a basic heal, we'd have a pet raise and a pet heal and a stack of eidolon focused abilities.