Thunder Bay has its downtown split between districts. (Basically, it is like a pie with downtown at the centre). Both of our downtown cores are split between two wards, and the ward I am in includes the north of one downtown, the south of another, and a large industrial/big box store area between the two, with the residential area by the university at its west end.
Downtown issues were basically ignored until a few years ago when the city realized that it should probably do something to fix the blight. So many suburban people are included in the wards that have parts of downtown (one "downtown" ward also includes a large rural area!) that when we have ward meetings, downtown issues are basically ignored in favour of silly suburban issues. Downtown residents are poorer and less politically active (even with the most people, my ward has the smallest number of voters) so no one really speaks out in their favour. Business interests from the downtown cores simply "buy" what they want. The people who actually live downtown are neglected and ignored. In the case of the downtown I live in, they're pushed out of downtown in favour of big ticket items like casinos, court houses and arenas.
Splitting the downtown will only work in downtown's favour if the representatives from each ward live in or near downtown. It looks OK from the current map, but if the incumbents are replaced by representatives from the outskirts of those wards (that does happen; we have councillors from two different wards who basically live in the same neighbourhood, the boundary runs along a major street between them) then downtown can basically forget about having any representation on council.
It's very risky.
Downtown South is split between McKellar and Westfort, right by the river. Downtown North is split between Red River, McKellar and Current River. In the Canadian political system, the process of splitting a single community between multiple districts, each one it shares with a demographically different region, is called "cracking". Thunder Bay itself is "cracked" between two federal and provincial ridings, with the city having 75% of the population in either riding, resulting in the total canceling out of rural voices when we elect representatives, which fosters resentment between the rural areas around the city and the city itself as they feel we're "exerting control over them".