To be honest, I didn’t go through the document yet but reading some posts here my brains just throw back to me what my thoughts were once upon a time already.
- Welsh should not be seen as “second” language in all Wales not just in some parts.
- Maybe it’s time to stop looking back to the history be reminded all the time that this and that is guilty that so many Welsh people don’t speak Welsh anymore or they even are not taught the language at all. It has to be the future look with considdering every single idea of how to “make Wales Welsh” again if you want to put things like that.
- In schools, just like @Deborah-SSi says Welsh should be considdered just Welsh (I prefer Cymraeg though) and not second or first or whatever language. This is language of Welsh people so they should speak it or at least be aknowledged to it.
- More conversational approach could do the trick, why not?
- Welsh language (and culture) should not be seen as a matter of centres, communities and people of the good will who are willing to put their effort into spreading it, teaching it and making people aware of it. It should be started by the government itself. Do all members of it speak Welsh and use it in everyday life? Here’s the start. The highest leaders should be example and those who all people are looking up to and not oposite way.
- and, yes, daily life should adapt to use Welsh first and even then English (if neccessary at all). This is Wales and people should feel at the first glance it is so not only tourists who come, maybe learn and try to use the language “in the wild” (our popular expression on here). And maybe … in key institutions it might be good every employee should know at least basic Welsh. By key institutions I mean all those of th public services and those which are “highly neccessary” in daily life.
- Not just schools, there could be other institution, especially those dealing with sport (like rugby clubs as rugby is highly popular and called national sport) should be considdered to play very important role in making Welsh to be taught and spoken in Wales. What people love they’ll adopt especially children. I’m happy to see WRU engaging with the public in Welsh now more then they did in the past so … this should be momentum to be used to promote the importance of the Welsh language and culture in general.
All the rest was said here already so I’d just waste anyone’s time to repeat it all. Wlelsh first then English should be the major and key thing to do first and of course making impression on children, young people that speaking Welsh is important, highly neccessary and great. … 
I’m looking very much forward to the day when there would not be needed signs in shops, businesses and pubs etc which read “we speak Welsh.”, “Welsh learners and speakers welcome.” etc, etc, but speaking Welsh would be rather so natural that no one would even think about whether speak/use their Welsh, no matter what small amount, at all but it would be totally natural to use the language just because they are in Wales.
From all this I just see I’ve done the only right thing when I was in Wales … spoke Welsh first and only then English if neccessary. However I think resorting to English was neccessary way too many times but, despite I’m not even close to be Welsh, that was not by my fault …