I celebrated Malaysia Day by doing a run in Putrajaya. The place pretty quiet as I'd have thought Putrajaya would do something to celebrate Malaysia Day too.
They did it at Dataran Merdeka this year - probably because the actual Merdeka ceremony during Tengku Abdul Rahman's time was conducted there. Personally, I like it that KL folks get to witness these events here in KL instead of having to head out to Putrajaya all the time. Having it here in KL will give tourists a chance to enjoy it for a change. Hope you had a good run at Putrajaya nevertheless.