No. No online wallet should be good for long term storage. Whereas, in the short term, with small amount, blockchain.info passes marginally due to their frequent downtimes and vulnerabilities. 2FA won't secure you from server side attack or if it's bugged.

I recommend bitaddress.org for address generation. They use browser RNG and mouse movement for added entropy which is random enough. Download it offline and print it using a printer. To be extra safe, try to unplug it for several minutes after printing to clear cache. To spend, use mycelium wallet cold storage function.