I would've thought that is fairly obvious - no matter the time-lines, you cannot deny the future of HD video is largely going to happen via streaming. Australia will need better internet infrastructure. You also cannot deny that the reviews and delays under the Liberals have not been helpful to either their or Labor's original time-line. I'm not sure where your problem is with this logic?
The only reason it was made free for Fox Sports users is the competition brought about by Optus taking the PL. That is what it has to do with competition.
Australia clearly needs better fixed broadband infrastructure, and this isn't the place to debate which brand of knuckleheads is most to blame for the NBN fiasco to date, but it is self evident that the NBN will not be anything close to fully built by the end of this Optus deal, nor would it have been under Labor considering their network would have taken longer to build, nor is this really even relevant to the lack of availability of a linear channel - streaming or otherwise - to anyone other than Optus subscribers.
The reason BeIN was added to the Foxtel Sports package is that it allows Foxtel to possibly pick up a few more subscribers and BeIN makes more money through a $1/sub distribution deal with Foxtel than $20 per month streaming.
Did the imminent loss of Premier League rights enter their thinking? No doubt. Would the BeIN deal have happened anyway eventually? Almost certainly. Is the consumer better off being coerced into switching telco providers and paying an extra $15 per month for the Premier League? Clearly not.
You do raise an interesting point though (in terms of both competition and funnily enough the NBN) that Foxtel in a post-NBN world, especially if Telstra sells its stake, is likely to become a major competitor to Optus in broadband and will have a pretty obvious competitive advantage by being able to bundle premium pay TV. So maybe this can be seen as a pre-emptive strike against Foxtel as well as ammunition in the war for subs with Telstra.
As an aside if you're interested in the future of pay TV / streaming and how they are converging, have a look at what Hulu is planning:
http://variety.com/2016/tv/news/james-murdoch-fox-hulu-1201766764/