A reflector is a WYSIWYG device, and it has NO shutter speed limitations as far as flash synch speed and resulting f/stop, which is something that "most" d-slrs these day are limited by: both flash synch speed, and f/stop range that can be employed with flash. SMall reflectors, like the round type that pop open are handy, but are, well, small reflectors. Umbrellas used with speedlights offer no modeling lights, and limited power options, compared with "studio flash" units of either monolight or pack-and-head design, so speedlights can not "overpower the sun" the same way that really POWERFUL studio flash units used with battery packs or inverters or generators. No one,single system is perfect or without limitations/issues/drawbacks. A 28 lb pack and 400 Watt-seconds of flash is nice, buuuut....it's a lot of weight, needs AC power, and so on. A speedlight weighs like a pound or so...
In terms of being "better off" with one system or another; that 'depends'. I think it's easier to make reflector fill look really natural than it is speedlight flash. The bigger the reflector, the larger an area it can fill; entire BUILDINGS can be used as reflectors in some locations, and a person can make his/her own large reflectors fairly affortdably. By large I mean 48x72 inches and upwards in size. Sometimes, a reflector can be small, and be ample, like a 24x24 or 30 inch circular, for a head-and-shoulders shot, but NOT for a family group of say eight people.
Just keep working at it. See what can be done with what you have. Gaining experience will give you the ability to assimilate and process and sift through more knowledge about the how,what,why,where,when of light and lighting. For example, at high noon, a single speedlight is a weak source of light on a wide-open, sunny August beach; at night under starlight, it's a VERY powerful light source.