look. talking about being for newbie shooter players; this frame is not simply op at first when acquiered. it takes multiple formas.a potato.and quality of life mods which can take a huge amount of time for someone who's looking to have their own ultimate build instead of looking for other people's build. (and not paying a single piece of plat for all of that)
playing as mesa needs the same amount of agility and mobility as any other frame. just casting ult and staying on one point to wait for enemies to come and rain fire on them wont work specially on higher level areas. you'll get harda$$ bombards,butchers,vulkar carriers, corpus snipers ,etc. play as mesa infront of them.dont watch your six for 2 seconds and poof:you're as good as useless and down.
as a mesa player myself,you wont catch me just standing around and sitting in one place,i get bored very easily.
you either sacrifice survival for a good offense [which you'll end up with lower shield and health] or sacrifice for a good defense [which gets you better health and lower firepower]
you'll spent another huge amount of time on picking the right secondary for ultimate use. and you'll end up using more potatoes and formas. and that will be a huuge amount of time spent (again) on building the right thing.
and yes.i've done all of the above without buying affinity or drop chance boosters so you can guess the time spent.