Sypha and Alucard have huge effects on the post-game story. Sypha goes off with Trevor and continues the Belmont and Belnades lineage -- essentially none of the post-Trevor Belmonts exist without her, and depending on exact lineage, Yoko might not either. Alucard later reawakens in Symphony of the Night and becomes a major mover and shaker of the plot. These characters are hugely important -- there's a distinct "before" and "after" in the chronology with them, and cutting either of them produces massive internal inconsistencies in the plot of the series.
Sorry Jorge but I'm going to have to agree with this sentiment wholeheartedly.
There really is no equating the roles of Alucard and Sypha vs Grant in the slightest as in saying it would be the
same removing Alucard and Sypha as removing Grant since the narrative of the series as a whole changes into something completely different with those 2 in comparison to Grant.
True enough the immediate aftermath as well as the rebuilding of Wallachia and Grant being known as a hero does give him importance but nothing nearly as lasting as Syhpa and Alucard.
Sypha's blood mixing with future generations of Belmonts is obviously tied to the gradual growth of the power of the family in later years which is very evident in Juste and by extension Richter who is not that far down the line from Juste (possibly son or grandson) as well as her future Bloodline being carried on within the Belnades Clan who helps the belmont family many years after CV3 and continued to do so all the way up until the final battle with Dracula and even beyond that within the Sorrow series.
Alucard went on to of course play a big role in the series during the events of Symphony of the Night and had he not the belmont line could have ended with Richter who was evil and thus doomed humanity, and lets not forget his efforts later in the series with making the Alucard spear, having a hand in stopping his father for good in the demon Castle wars, and lastly aiding Soma and steering him on the right path during the Sorrow games.
My point is that these 2 went on to have a
LASTING effect on the post CV3 continuity and as such they are obviously more important to the narrative than Grant there really legit is no disputing this in my opinion.
All that being said I agree that Grant DEFINITELY should be in the Netflix series since while his story isn't that important to events later in the series they are VERY important to those events during it and leaving him out would not be the right move.