I'm not really seeing a clear path to 2005 either. There is no mention of a 70-year timespan, only a date, 70 CE. And as for the "soon", "impending" verbage. That's a constant. They've always used that. It's nothing new.
IMHO, if you read 2005 into this, then it's just like when they claimed people saw them pointing to 1975. If you see 2005, you are drawing your own conclusions.
As for 1935, that does have significance to JWs. I forget the exact reason and probably most JW's for the last 50 years don't know the either because it didn't get brought up much. But it has something to do with "sealing" the 144,000 from what I remember. I think in 1935, the 144,000 were all selected, unless one "fell away" and had to be replaced. Since 1935, anybody who becomes "annointed" is just a replacement called up to replace somebody who, for instance, went apostate. I guess even the replacements have to be replaced because the partakers are still out there and occasionally even increase. Guess a few hundred 90-year-olds found an good "apostate" website and lost the faith.
The true governing body members for all these years have been made up of only those "annointed" before 1935. Apparently replacements aren't good enough. Hence, as the board ages, they have been faced with some difficult choices, including having helpers annointed after 1935.
Another thing about 1935 is that may point to future changes. The original 1914 thing presumes that Nebuchadnezzar conquered Jerusalem in 607 BC, and 2520 years later is the end of "the Gentile Times" in 1914. But, history tells us Nebuchadnezzar probably conquered Jerusalem in 586 BC (maybe 587 BC), 21 years after the WTS says. If you add 2520 to 586 BC, you get 1935.
I think they're too scared to abandon 1914, but if they do, 1935 could become the new 1914 - and a more accurate one that doesn't put them in a position of discrediting every Babylonian historian on date issues. It's just that nothing significant like a world war happened in 1935 to bolster the date. And what does that buy you, a mere 21 years? At this late date, they'd have to move their dates up at least 70 years to give them some breathing room. Next thing you know, they'll figure out a way to turn 9-11-01 into the new 1914, when Satan was cast down with great anger against the USA.