I have the full version of Reason so I am not sure about the exact details of the stripped down version of Essential.
If you look the comparison chart on Reason 9 vs Essential 9 you can see that there is a Midi Out/Midi Clock Out and it's included in Reason but not in Essential.
The file format I mentioned only because in Essential it appears that Essential projects are self contained, you cannot import Reason files. You only use Refills in Essential in a limited way which are a big thing in the Reason world.
Reason certainly can and does audio track recording well. Reason does not play well with others outside of the Reason sandbox. It's getting better, every version gets better. Propellerhead disbanded their forums. there used to be a lot of talk on their forums about midi, syncing to external hardware etc. they never addressed these concerns and haven't for the most part.
If you want some good rack FX and synths and the use of samplers then Reason does that very well and there are a lot of REX and refills out there to play with. this can be rewired into a HOST DAW and used like a VST plugin synth sort of. if you want simple straight forward audio recording Reason can do this and does it well. If you want midi and controlling external hardware boxes look elsewhere, it's not Reasons strong suit nor designed with that in mind.
I quite honestly only got Reason so I could do REX files and import them into Spectrasonics Stylus RMX that was my sole purpose. the Reason rack extensions and quick audio editing was a plus, the refills and the samplers that Reason has are really nice to use and the rewire functions into Sonar a huge plus.
I have and maintain Sonar as my main DAW, it's what I grew up on (still learning). Now I have ProTools 10/11, Cubase 8.5 Pro, FL Studio Professional, Ableton 9 Suite.
ProTools I use and got because of an Eleven Rack hardware box that came with ProTools. like Protools but rarely use it.
Cubase I got because I have a lot of old hardware boxes and Midi is important to me. Cubase just handles midi better than other DAWs, so I use Cubase for that.
FL Studio has one of the industries best piano roll input. it's just fast, works, and makes sense. A lot of the other functions of FL Studio do not make sense so I use it for inputting notes fast and laying out ideas in a piano roll style super fast.
Ableton 9 Suite I got because Max is included and there are a ton of free Max devices that control or work with hardware midi devices. I don't like Ableton all that much but how it works with Max and the use of these wild free Max devices is incredible.
Sooooooooo why are you interested in Reason at all. what do you hope to get it to do in Rewire into Sonar? to what purpose do you need it? $60 bucks is not a lot of cash, but if your throwing it away on something you wont use I would suggest you go to the table and roll the dice a few times, you may win but if you loss you'd be in the same situation.