Love this add on and I use it nearly every turn.
If you introduce some tweaks I suggest:
1) Differentiate Ion storms by voltage and state (growing/reducing)
Displaying the "useful" position of the storm is fixed by this add-on, it would be even better if it also does the same with the voltage ranges.
Normal (less than 140, weakening 150), Dangerous ( growing 140-240, weakening 150-250), Oh Very Dangerous (250+)
I suggest to use these thresholds because each turn, the voltage increases by a random amount between 0 and 10 MeV in growing storms and what one wants is the "forecast" of what is coming next.
Obviously only for 1 turn forecast, more turns it is just too complicated :)
2) By default, activate 1 turn forecast by default when the addon is selected from the maptools.
3) Take into account ship missions. Mainly advance cloaking and intercept.