I have a few observations :
1. The guidelines for FUDCon logo are at [1]. Even though I personally
like Prima's calligraphic style more, I would still vouch for the
style in the guidelines for the sake for uniformity. We are already
violating clear-space guidelines for the logo (but it seems to have
become the norm now since past FUDCons - Pune, Cusco etc but this
change looks good, I think)
2. I give a +1 for Temple of Heaven logo. However, the logo vector has
to be improved (something like current Forbidden city gate logo
style). My previous experience of having a print of such vectorized
logo has not really been that great.
[1]
https://fedoraproject.org/wiki/Logo/UsageGuidelines#Guidelines_4
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Suchakra