I think if you’re interested in trying a pump you should do so!
A lot of the companies offer some sort of trial period, and even if you keep it after that, you still don’t have to use it for life, which is something I feel like a lot of people forget.
There is a decently steep learning curve to using a pump well, so I wouldn’t attempt a pump start, say, during finals week, or right before going on a vacation; and I wouldn’t bother testing one if they didn’t give you at least 3 weeks with it as it takes some time to work out all of your rates and ratios (they’ll likely adjust at least a little from when you inject) so that you’re in a good place and actually get to have some fun and easy time with it to see what it can do.
As to small doses, I don’t need them, but all the kids I know use the Omnipod and they (and their parents) are pretty happy with it so it must do a good job with tiny increments.
I have gone back and forth between pumping and MDI several times over the last 2 (or is it 3 now?) years for various reasons, and what I’ve learned is that there’s no one-size fits-all answer, everyone’s experience is different, and even your own experience can be different depending on what pump, what season, what activities you are doing and what your current priorities are, and what you know to compare against. When I first moved from injections (of R & NPH fixed doses, no carb counting) to a pump in 2002, my life changed and it was the most amazing thing I had ever experienced. Eight years later I switched brands, learned that every pump behaves just a little bit differently and the new one solved some problems I didn’t know I was having, but did some things I hated that I had never thought to consider. Two years after that I ditched that pump and went to injections of Lantus and Humalog, and that too was the most amazing thing I had ever experienced! I use(d) an app that calculates doses like a pump, and my control was the same back on injections as it had been with a pump, so I got all of the control benefits with none of the baggage (both literal and figurative). For a few months I tried the untethered approach (Lantus + pump) and that was pretty awesome too for various reasons. Then a few weeks ago along comes a company offering a free trial, and today I’m pumping only, but I’m not really thrilled with the results/equipment so I’m not sure I’ll keep this one, and I’m fine with that because I feel like I have a good handle on what some other options are and how they compare.
Long story short, the only thing you have to lose by trying a pump is not knowing which works better for you at this place in your life!
(Okay, and probably several hours that will be taken up with appointments with endos, pump trainers, CDEs, etc, but even if you don’t keep the pump you can probably learn some good things from them.)