If you really want to feel that you've been in the Swiss Alps then forget about the tourist trip up the Jungfraujoch and go for a half-day or full day hike in the area instead.
Take a picnic of Swiss cheese and bread and some local fruit in season and something to drink and walk through Alpine meadows full of cows with their bells.
You may not be the envy of all when you get back home but you would have had a much better and more personal experience.
I understand your points, but we have 4 full days to enjoy the swiss countryside by car and rural roads.
I googled some, went to pass website, and here it what it tells me
The regional pass is 260 CHF for 2 people
With this pass there is 50% discount on Jungfrau
So for 56+56+260 which comes to 272 CHF we can visit Jungfrau anytime we like(paying 12 more than the good morning)
There is another reason for doing this. There are some great hikes up there, and cable car/gondola is expensive.
This will allow us to dedicate one more day to see other stuff. In in blatten for half the fare.
So its money saved.
thanks for all your help.
The dilemma is sorted
I am going to contact them if there is a way to purchase this 1+1 offer without doing it online, as shipping charges are a killer. If I can buy it Over the Counter, it will be 233 only!
Since we have 5 full days, we can do Lauterbrunnen-jungfrau-eigerglecher by 11am, walk down to kleine sch, take a gondola mann. and then train to grindelwald and then do a boat trip or something.
I think you are trying to cram too much into one day, especially if you want to do a boat trip as well. Assuming you get down to Kleine Scheidegg at 12, have lunch there (say one hour) then walk up to Männlichen, you will get to the top at something like 15:00. Another hour to get down to Grindelwald, get from the cable car to the station, that's 16:00. train down to Interlaken, 16:45... you will not be on a boat before 17:30.
There is no gondola from Kleine Scheidegg to Männlichen (if that's what you mean by "take a gondola mann"); you either have to walk up or go back down to Wengen/Grindelwald to get the cable car.
I wouldn't walk down from Eigergletscher to Kleine Scheidegg - you will be walking beside the railway lines and under ski-lifts all the way, with the KS railway junction in full view... not very scenic at all. Better to walk from Eigerglescher to Alpiglen via the "Eiger Trail".
I really think you need to get a map, and use it while you do your planning. Google Earth will give you a good idea of the general layout of the area, what's up high, what's in which valley and what the mountains are in between.
Alpiglen is on the train line from Kleine Scheidegg to Grindelwald. To get down to the lakes (I am assuming you mean the Thunersee and Brienzersee), you would get the train from Alpiglen to Grindelwald, then change there to a train to Interlaken Ost. The boat landing stage for trips on the Brienzersee is about two minutes' walk from the station.