Who is proposing to leave the transaction cap alone (retain blocksize limit in 1MB), and why? (Where is the battle line? 
)
)A good starting point to research this is https://bitcointalk.org/index.php?topic=709970.0 and the links in the OP's post. There was a fair amount of discussion on this in early 2013; however the discussion goes all the way to 2010. A forum search for
Code:
max blocksize
yields 3 pages of results. Other variants of the above search will lead more results. There is actually quite a fair amount on material on this. A poll conducted in 2013 on this subject is quite revealing and shows the split in the community. https://bitcointalk.org/index.php?topic=145636.0As an aside I came across rpietila Altcoin Observer https://bitcointalk.org/index.php?topic=624223.0 while researching this topic myself in early July and as a result got involved with XMR.