>>5412404COUNTERPOINT
The Imperial Navy does not exist yet. The Imperial Army comprises both naval and ground forces in one. Both the later Imperial guard and the Imperial Navy were intentionally designed to be smaller than their former Great Crusade counterparts.
We will never be the Imperial Navy. We will be the Mechanicum Baskilion and later will transform into the Mechanicus Baskilion, an organization which still exists as of Indomitus. Not to mention we are also a Space Marine Legion and later a Chapter. Our doctrine can be as different from the rest of the Imperial Navy as we please.
If you are using the Wiki as our source on Cruisers being the majority of the Imperial Navy (they didn't seem to source this part), I would also point out that the same Wiki mentions and sources from the Battlefleet Gothic rules:
>Though the total number of ships the Adeptus Mechanicus has at its disposal dispersed among its many forge worlds is far outnumbered by that of the Imperial Navy, it goes without saying that those responsible for all starship construction reserve for themselves among the most powerrful and best-equipped warships encountered anywhere in the Imperium.>Adeptus Mechanicus vessels represent the very apex of Mankind's technical prowess, and they have access to resources and technology unavailable to the vast majority of the Imperium.So there is perfectly acceptable reasons why Talos fleet, like any Primarch's fleet but especially his, may be much larger, better supplied, and different from a 40k Imperial Navy fleet. Astartes fleets in the first place don't really conform to Imperial Navy doctrine.