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So, forcing payment for costs of mana abilities to coincide with announcment? Seems fine to me.

I cannot announce the filtering ability of the elf unless I can, at that same time, pay the 1 mana cost... Still allows for out of order sequencing- I announce the ability then tap my land with the acknowledgement that I would have tapped first in order to have had access to the 1 mana.  

Seems like that would prevent announcing of the filter ability and then sacking to the altar- out of order sequencing would not allow you play an ability of the elf after you sacked it.