Good post. This is very true in my experience. IEEs do cut you off when they are hurt, and explain nothing. That sort of radio silence is pretty painful for Fi HA's, who typically engage their restrictive functions to control the situation (ILIs begin to limit their partner's options (Ne), SLIs limit their partner's actions (Se))
Well, back on topic, I don't think it's hard to tell SLIs from ILIs. SLIs do not really like to stay inside for long, they tend to be "street people". ILIs, on the other side, can be really homebodies. Though there are exceptions of course. My ex is an ILI and likes outdoor skating quite a bit.
Hm I wonder if this is true of all sensors vs intuitives. I would imagine sensors, being more identified with their bodies and senses, would easily become "saturated" with their home environment, whereas it would take longer to satiate an intuitive because half their attention is on abstractions. A positive change to a sensors' home, such as new ceiling lights, would probably affect them much more than an intuitive, who may not even notice.