The communicator became a combadge, and at that point, no, it definitely would not make sense to combine it with the tricorder.
A tricorder is a scanning device, and today, in 2018, there are dozens, maybe hundreds of different types of scanning devices, each with a unique function, that different professionals use. They don't use their iphones, and even if say, a do it yourselfer wants to use his iphone to scan the studs in his walls, he still needs a special stud finding adapter to plug his phone into.
A phaser is a weapon. That is it's purpose. It doesn't generate forcefields. A "stun" and "kill" setting don't make it the gerber of the future; they make it a weapon. When someone in Star Trek needs to cut through a bulkhead, and they have the resourses, they use a plasma cutter(or something similar). When Sisko builds his sailing ship, he asks O'brien to get him a sabre saw. O'Brien says "A sabre saw?! Why wouldn't you just use a laser cutter?" He doesn't say "Why don't you just use your phaser?"
If I can screw in a phillips head screw with my pocket knife, that doesn't mean it was designed to do that, and I would use a driver if I had access to one.
A tricorder is a scanning device, and today, in 2018, there are dozens, maybe hundreds of different types of scanning devices, each with a unique function, that different professionals use. They don't use their iphones, and even if say, a do it yourselfer wants to use his iphone to scan the studs in his walls, he still needs a special stud finding adapter to plug his phone into.
A phaser is a weapon. That is it's purpose. It doesn't generate forcefields. A "stun" and "kill" setting don't make it the gerber of the future; they make it a weapon. When someone in Star Trek needs to cut through a bulkhead, and they have the resourses, they use a plasma cutter(or something similar). When Sisko builds his sailing ship, he asks O'brien to get him a sabre saw. O'Brien says "A sabre saw?! Why wouldn't you just use a laser cutter?" He doesn't say "Why don't you just use your phaser?"
If I can screw in a phillips head screw with my pocket knife, that doesn't mean it was designed to do that, and I would use a driver if I had access to one.