I've never noticed a problem with smoking from the tin/pouch or even the bag (bulk blends), like with cigars right off the truck. If the tobacco is to moist in the tin it's going to be moist in the tin after a wait period as well. Most tins keep the tobacco moist for long periods of time. If the tobacco is to moist then just let it sit out for a bit (time varies depending on moisture level). Like mentioned earlier, loading a bowl in the morning for smoking in the evening can work well. Some tobacco comes very wet, mainly aromatics, so some people pop the tin and jar the tobacco but it will keep well in a mason jar so drying time will still be needed for many tobaccos.
As for tongue bite, slow down and just lightly sip the pipe. If you are drawing on the pipe as if you are smoking a cigar you might be drawing to hard which will cause the tobacco to get super heated and burn your tongue. Remember the butt of the cigar works like a filter and you don't get the heat on your tongue whereas the pipe gives you a blast of hot smoke on your tongue. Really wet tobacco can also lead to tongue bite so drying the tobacco a bit can help, but mainly going slower and lightly sipping the pipe will help the most to prevent tongue bite.