Every person is changing her/his whole life. So I do not say a planet is "at the end of a house". Instead I check at what age the secondary progressed planet moved into next (or - if retrograde - into previous) natal house, and how long it will be there (or when will it move into consecutive next one?). Why natal? Secondary progressed ascendant (in english astrology called "quotidian ascendant") moves about 361 degrees per year. So a planet (sun/venus/mercury/mars) spends there only about a month in a progressed house, while it spends about 30 years in a natal house (double it or halve it according to particular house, house system and geo latitude). Result? Secondary progressed house position has little personality change potential, no more than transiting sun has. Secondary progressed planet in a natal house has more potential than transiting saturn and pluto both have - it spends more time in a sign than whole saturn cycle lasts, and more time than most of the time pluto is in one zodiac sign. And it's your inner and own - yours only - cycle that moulds and changes you.
Another interesting phenomenon involved here - the natal position relative to the progressed position becomes the relative "twelth house". Read it - tThe blurred past that we forgot or do not understand anymore or look through coloured glasses at it or not care anymore. The difference with nearly the same chart with slighly changed axes - so secondary progressed sun moving from 5th to 6th at the age of 5 or 15 years - are tremendous. And of course the progressed position relative to natal one is more visible and more noticeable. That's why natal houses not working at younger ages, at older ages seem to work better than correct ones. And these seemingly working good at younger ages stop working at certain older age. The answer here is definitive - without the tool to dynamically model this personality changes there is no possibility to find correct house system for the whole life. On the other hand, suprisingly, applying this modelling has noticeable sharpening effect on comparing different house systems in charts, it becomes much more repeateable process.
Also the exactitude of birth time is highly important. I researched the differences between many house systems. The averaged difference (sample of several thousands of charts) between planet house position (magnitude of difference similar to house cusp position difference between two house systems) for house systems most often used at the latitude of 52N, is only 8-10 degrees. 8-10 degrees mean about 30-40 minutes of time. At the latitude of 35N (near southern border ot the usa or in northern egypt) it is only 4 degrees - about 15 minutes of time. These are averages of course, but time of birth off by quarter of an hour to half an hour (depends on geographic latitude) wipes out (on average) big chunk of differences in the chart drawn in two house systems have. So as with averages there are chart that 15 minutes off is enough, sometimes an full hour has still some differences. (comparison screens are at www.astrologia.pl/sehouses/temp/ - these statistics can be recreated using many other house systems as base beyond these two presented here).
Deep medicalization and centralization of births only recently created the situation when significant part of the population has birth times known with exactitude better that quarter of an hour. Here in poland siginificant number of people at ages younger than 45 years (in Poland ithis move was completed in 60-ties) has time that in rectification process was moved back less than 10 minutes. Ie they were recorded to next nearest 5 minutes, falling in ranges to recorded time as <-5, 0> or <-10, -5> minutes. In generation a generation older it was quite often 1 or 2 hours or more, with some astrologers of older ages still moving clients's ascendant by up a sign or two freely after few minutes's talk calling this free float wide range ascendant and houses change "the rectification".