I'm on low carb and I tried to get off my pump as well, mostly due to Doc Bernstein's negative outlook on pumps, so I switched to Levemir for a month, which is similar to lantus.
Overall, I found that my averages shot up no matter what I did and it was hard to get the injections and timing right. I tried twice a day, then 3 times a day, evenly spaced. 2 times a day ended up working best for me, as I would forget 3 shots sometimes and things would go haywire after that. For 2 shots, I took one 5 unit dose in the morning and one 4 unit dose at night before bed.
I found going back to injections to be much more effort and work just to achieve a less than ideal basal with a lot of fussing. After now being back on the pump, I really can appreciate how awesome the device is - it basically takes care of your basal in a way so that you don't have to be dealing with all that and for someone like me, who's not exactly Mr. Punctual, it's ideal that a robotic like device is doing the thinking and acting for me.
Just my 2 cents though :)