Not quite I think. Many objections to capitalism could also apply to market socialism. I think the latter would probably be an improvement, but how much is open to grave doubt. I think you need to say something about the purported benefits.
For instance, there is no reason why the crises envisioned by Marx could not occur under MS. Instead of accumulation driven by individuals, you have it driven by groups. If capital is owned external to the enterprise, you have to go some way to define the sort of ownership that is implied and note the horrendous problem of how capital is allocated and accumulated in that setting. In this sense, "market socialism" is a question masquerading as an answer.
mbs