What can you tell me about visiting Mexico?
Well depending on where you want to go.
In genereal, the circunstances at the moent are good for foreing people from Europe, USA and Canada... Or any other country with a wealth currency.
If you want to go to resorts in the beach, it is the best time because hurracane season has finished and you'll find +20°C even in winter.
If you want to come to big Cities like México City, Guadalajara, Monterrey, Puebla, Oaxaca, weather is also nice, not as hot as in the beach but the lowest temperature you could find is 5°C on December.
If you want to go to the hills with indigenous comunities, it might be a bit more cold.
If you mean anything else by "The circunstances at the moment", well just avoid messing up with drug dealers, dont go showing off you are a wealthy tourist, avoid walking alone at nigh time throhg conflictive neighborhoods.
You'll be fine just enjoy México in a respectful way