Well, maybe not much. Not knowing anything about the lawyer or the practice I'll make some assumptions in typing the below.
You'd benefit from practicing in association with someone established and you'd have access to their resources. Presumably, their office will refer a bunch of your clients to you, you can rely on the lawyer for mentorship, and you'll enjoy not having to rent your own office, incur your own startup costs, and figure a bunch of startup-y things out on your own. In the short term, as a new call you might enjoy the association as you'll have some amount support and work-flow in your direction. By year #2 or #3 you might look at the fee-split and start to wonder why someone else is making money on your labour.
I don't think there really is a normal for small/solo firms and these employment/association relationships. They really run the spectrum from employer-employee to two people that just share a roof. Many factors.
My new OSAP estimate came in, and it is about $11,000 less than what I would have qualified for if my 1L classes were taking place in-person this fall/winter. This seems ridiculous because tuition at Osgoode is not decreasing (still north of $25K), and my living expenses have increased (food prices have gone up, and now I need a full home office set-up for law school, plus rent payments, etc). Not only that, but my summer employer has had me on "unpaid standby," and I haven't been able to locate any other meaningful or suitable work during the pandemic.
Is it fair for OSAP to now be drastically cut because law schools are going virtual this year? If loans/grants are being cut, then it follows that tuition/books/living costs should also decrease. However, that is nowhere near the case. In many instances, expenses are on the rise. What gives, OSAP?!
This is an issue.
The following is one of the requirements of applicants using OLSAS:
Having agents edit your autobiographic and personal submissions violates this requirement. As other have mentioned, Queen's could probably compare your LSAT writing sample to your submitted autobiographical/personal submissions and deduce that they weren't "authored solely and entirely by you."
It's one thing to ask someone you know for feedback on your writing and make adjustments. It's another thing entirely to hire application agents.