I had the sink on and some water went down the mouthpiece of my lemo by accident. I took it apart and cleaned it and put a new coil on but it seems the flavor is not as strong and it is just a different vape now. Have I ruined it? I thought just putting a new coil on it would be all I need to do.
You have done no damage to the Lemo at all. I would have just continued vaping and the old vape experience would have come back once the water had been vaporized out of there. In the meantime the vape would have tasted a bit watered down (weak in flavor).
I suspect any difference in your present vape is either due to you not making exactly the same build (wire and wicking) as the original, or it's mind over matter in that you think the taste may be different so it seems that way to you.
Either way, if it vapes reasonably well now I suggest you give it a day or two and if you still find the vape a bit lacking rewick the Lemo carefully, as similar to the way you did it the first time as you can.
Best of luck with it
