Ship design

im watching a recent discovery episode and i saw another future(current) star fleet ship looking very cool and i saw the disovery next to it, and it hit me:

why is the discovery the shape that it is?

ive only really seen modern trek, none of the older stuff of picard. so perhaps the originals designs are explaib there are it carries over but idk.

anyway, i can understand how a typical ship might need to have a front and back for how the engines work for travel, but for the discovery, they just instantly teleport anywhere, so in theory the ship could just be a big sphere,

perhaps that would make them an easier target tho, so why no a massive spider web type of thing, way trickier target, and they can beam between the areas, i cant quite recall how the warp drive works, does it need a physical connection to the stuff its transporting? if not the ship could litteraly be a swarm of compartments and they just “extend the field” of the warp drive or whatever.

these are just random ideas, but my point is, is there much of a reason for the discovery to still be the shape it is? other then just not fixing what isnt broken.

(also, how does the spore drive work? i know there was a reason why they couldnt replicate it for other ships, but is it not possible for the discovery to link to another ship, or even the headquarters or whatever its called, and just teleport the whole thing)