No, I really do not think going to EC2 could be beneficial in any way in terms of improving resiliency compared to Softlayer. SL allows you to control which VLANs your box will end up on. VLANs could be treated as racks (since they do not allocate more than one VLAN per rack). Then you have multiple DCs in one region (e.g. DAL01, DAL05, DAL07, etc) and you have many different regions (DAL, SEA, WAS, AMS, etc).
I'd be very interested what problems you were having with them and at what scale. If this is a private topic, we could do it over email or some other medium if you like. You can contact me by any of the means listed here: http://kovyrin.net/contact/
I'd be very interested what problems you were having with them and at what scale. If this is a private topic, we could do it over email or some other medium if you like. You can contact me by any of the means listed here: http://kovyrin.net/contact/