Thing is, 10 years ago the park was coming to the end of what was years on continuous investment which was realistically never going to continue at the pace it was
But going to your list - I think some (not all) of them are possibly a bit harsh though..
2007 - Agree more could of and should have been done - it looked ok with the pools / sand till that was all removed. Could be improved with little cost.
2008 - Agreed
2009- Yep
2010 - Wouldn't say it was a flop, whilst it was clearly short team it complemented Saw and the park during its busiest times
2011 - Agree
2012 - Very weird one - not the rides fault IMO but a good solid reliable coaster - probably exactly what the park needed - I'm sure its still not had a whole day closed?!
2013 - Again weird one - Crash Pad was a cheap hotel but is pretty unique and obviously gets good feedback
2014 - Think Shark Hotel is an improvement - it has more identity to it is quirky and added more rooms, was often fully booked so people must like it? Angry birds land - opened up an otherwise dead part of the park (amity was already pretty split to be fair!) and added much needed family / indoor attractions.
2015 - I think will be a good addition in a obviously low budget year - another needed indoor / family attraction. Is the IP bad? Everyone knows of IAC and sounds like it will add a pretty unique compared twist compared to normal horror mazes we get.
Have high hopes for 2016 still and looking forward to seeing that progress.