Original tiles frecency showed it was less engaging than our query - experiment done and reverted from code. Ed's showed an improvement and so we graduated it.
Locally Fetch Metadata lauched a 2.0 version - showing better results (search is ok, blocks are ok - what's going on here? more investigations to come)
Results from top sites screenshot experiment were no good, so it may be broken up into 3 new experiments:
i) Always show a screenshot
ii) Make top sites bigger in general
iii) Use high res icons + other CSS changes?
current or done: