The starter editions are a bit of a con from Ubisoft as expected as there is no upgrade option so you essentially have to terminate the licence and then re-buy the standard edition to progress normally. I'd avoid these versions otherwise unless they are free like For Honor and then if you're interested in the game, you can grab it at the normal or sale price rather than buying the starter, revoking the licence and then paying out for another separate edition so you end up spending more money on something that was seemingly an intriguing offer.
If they had an upgrade to standard feature where you paid the difference between the starter and that version, that would be ideal or even if it cost a bit more but what Ubi are essentially offering is a paid trial and then you pay the normal price so they get paid off twice.