The only real issue with it was that it got sent during the recent surge in BTC value, and there has been an enormous increase in transaction volume... and the mempool is full of unconfirmed transactions.
I'm unsure of the "exact" fee paid as it looks like it is a SegWit transaction and so the block explorers seem to be reporting different things (some say 372 bytes, with 78 sats/byte, others say 150 bytes with 194 sats/byte fee)
372 bytes: https://blockchain.info/tx/e52cab238167d87f6b90da46609dbe26c3f7f4776ae4857f196f99ef91640813
372 bytes: https://btc.com/e52cab238167d87f6b90da46609dbe26c3f7f4776ae4857f196f99ef91640813
150 bytes: https://www.blocktrail.com/BTC/tx/e52cab238167d87f6b90da46609dbe26c3f7f4776ae4857f196f99ef91640813
150 bytes: https://blockexplorer.com/tx/e52cab238167d87f6b90da46609dbe26c3f7f4776ae4857f196f99ef91640813