It's a good strategy. I envisioned a similar move, but based more around capturing the airfields in the east with airmobile groups and establishing a stop line from Kharkov down to the Dneiper. I didn't envision threatening Kiev, but that's a strategically sound move in order to draw forces away from the east of Ukraine.
I also didn't factor in Odessa, possibly because at that time it was still relatively calm there. I don't know if Odessa could be held via sea-link purely, so you'd have to establish an overland route which would be open to interdiction. Personally, if it was up to me I'd leave Odessa alone and focus on taking eastern Ukraine.
Neutralise the naval forces around Odessa though, perhaps naval mines and the like, but no actual naval invasion.