Comparison inevitably will be made to The Vikings since these shows walk on the same genre. However, Beowulf is the more casual of the two, using special effect and colorful scenery for broader demographic, a bit like the animation from years earlier only without CG Angelina Jolie. This direction if fine, not all recent works must be brooding and gritty, although Beowulf suffers from erratic shifts in plot as well as a few dubious displays of mythical creatures.
It is noticeable that the story pushes the titular Beowulf into many tribulations from the first steps. Unfortunately, this sets up too many subplots at the same time. Characters are being murdered, betrayed and chased even before any connection could be made to any of them, which presents a couple of strange seemingly rushed developments. It also tries to present some mystery and political struggle, but these aspects lack depth since they have to share the scene with many other angles like childhood memories or shoehorned romance.
Much of the resources evidently went to costume and setting. The attires these characters don are incredibly polished, certainly different yet appreciated fashion from typical medieval series. Its surroundings are fairly gorgeous as well, colorful both in human settlement and natural landscape. If any flaws should come from this eye-catching presentation, it's that the characters look a tad too modern for the era.
CG effect is a toss-up, some scenes look terribly crude while few others look very meticulous. At its best, the display of creature is presentable, having decent features and surprising detail on fur or beastly motion. On the other hand, when it falters, it further weakens the immersion since the human characters already react unconvincingly to inorganic monsters.
Beowulf: Return to the Shieldlands is a light excursion for wider audience with more colorful presentation, although the cumbersome plot and sloppy CG might undermine that effort.