So darksend transaction fees can be very large compared to other cryptos since it rounds up to .1 dash. Is anything going to be done about that?

We've made some massive progress on the DS side and the next version will support network wide anonymity, that doesn't obscure UTXO like cryptonote, is instantaneous, has no bload, has blinding and other identity protection built in. We won't require a name anymore for the service, because it's not a service, Dash will just be anonymous by default.