Suggestion: Intel Map - Planning Map
Many people use the intel map to help plan out fields. There have been, over the years, numerous complaints about the map not functioning correctly.
I would like to suggest creating a planning map.
This is something where you would click a button and get the most recent data. Then, however, nothing would update unless you specifically made the request. This would allow you to scroll, pan and zoom without the need to constantly reload data. It would also reduce overall server lag and bandwidth usage as most of the visible assets would be stored in browser cache. This also means it would save Niantic money. I would make sure that there weren't any kind of "intelligent" actions. (ie. automatically trying to create a link to some random portal instead of the one you want)
It seems to me that the constant reloading of data is unnessessary until you move from the planning stages to execution. Then you would just click a button, get updated data, and then go from there.