It is exactly what Sdogar has said. Bolan/Ravi are based on a late 1970s platform but still selling like hot cakes in Pakistan. Do not compare Pakistani market with other markets. Pakistani market is not consumer driven like the international market but driven by assembler mafia and pro-existing assembler mafia government. There is no competition here. City is the only sub-compact category Sedan in Pakistan. there is no other option for consumers whatsoever. GLi falls under compact category. This is why city's resale may rise in the future instead of falling down.
So there structure of Pakistani market:-
Small cars (all -types ) = only 1 player Paksuzuki (Over 60% market is in this segment)
Sub Compact = Honda City (again only 1 player)
Compact = Toyota XLI/GLI (again only 1 player)
Compact (upper end) = Honda Civic/ Corolla Altis (2 players in this segment that's why some competition n relatively better offering i.e dual airbags in civic but this segment is very small)
Just to tell you existing assemblers are influencing future policies are trying to block new assemblers from entering the Pakistan market. There is already opposition and lobbying from assemblers to grant incentives to Volkswagen, Nissan, and General Motors. These three potential entrants are in talks with government but so far there is no concrete progress. Government has been unable to develop policy since 2012 as well and seems to be delaying it repeatedly (even this policy is not pro-consumer in its current draft form). Further more existing assemblers, especially PakSuzuki also are against safety standards implementation.
Unfortunately, to me it seems until and unless monopoly of existing assemblers is broken and competition is introduced things are going to get worse in Pakistan's auto industry for the consumer. You can even see back in the 1980s and 1990s even Paksuzuki replaced models after 5-7 years (FX, Baleno, Khuyber, Margallah are were not sold beyond this) but now if you look at their lineup their cars are not being replaced. Honda replaced previous city models on time. Paksuzuki has set a wrong precedent which Honda is starting to follow, if situation remain the same to maximize profit repatriation to Japan, Indus may also explore option of not replacing model.