Possibly, but after sniping you have number of options, and you bought plenty of time. You have time to get villa stack, you can do noting and snipe again. You can BT as well. As attacker (at most cases) usually is not expecting fail, hence will not be stacked. There is number of option what you can do. If his troops not get home in NB (night bonus) I don't think so BT-ing him is dumb. He will have only Ram speed walking time to get stacked. Always take into account how close he has tribe mates able to support him and if those accounts are active at that time. As surely only small number of them will be online and have some reasonable defense at hand.
My point is, if you can stack, stack it. That is the safest option. But if you can't then this is not the end of the world. If you successfully gonna snipe and BT him, this will set him back for weeks. All of course depends how many villa player has etc.
Regards to loyality, if you gonna snipe after first noble, then you are down to 65-83. Let say takes him 5 hours walking. Thats 10h trip which builds up 1.5 loyalty every 1h (and you might wait a "bit" to rebuild losted nobles). If he has one village only is not really point to resend. As you need to rebuild noble and you may face stack or being sniped again.