Lotus should ditch Grosjean, although Massa hasn't exactly been a clean racer in the past few years, hitting hamilton, trashing his suspension on that same corner a couple times a couple years ago. Seems to crash an awful lot more than Alonso, but still less ridiculous, less bad and less racing incidents than Grosjean. Lotus without Kimi can't get as good a no.1 driver to replace him and I think massively need two new drivers. A less good no.1 but a better no.2 to compensate and hopefully be not too much weaker. They'll lose points without Kimi but they can gain some back improving on Grosjean, too inconsistent, to dangerous, too stupid to be a F1 driver.
Massa and Hulk or Di Resta wouldn't be a bad line up, Hulk and Di resta would work as well to be honest. I really don't want to see Lotus struggling along with just Sir Crashalot as their no.1 driver.
Also not exactly convinced that just Massa's crash was responsible for his seeming lack of speed since then. He wasn't a flat out no.2 before Alonso joined, competing for titles before he joined. I wonder if being a no.1 at any team might make him push harder. Quite a few drivers who get stuck in that no.2 role just stop trying basically.